I was in creative mode on superflat if that matters

---- Minecraft Crash Report ----

WARNING: coremods are present:
BetterFoliageLoader (BetterFoliage-MC1.10-2.1.0.jar)
LoadingPlugin (Quark-r1.0-51.jar)
AppleCore (AppleCore-mc1.10.2-2.0.0.jar)
LoadingPlugin (ChunkAnimator-MC1.9.4-1.2.jar)
FMLPlugin (InventoryTweaks-1.61-58.jar)
MalisisCorePlugin (malisiscore-1.9.4-4.1.1.jar)
dsurroundcore_unofficial (DynamicSurroundingsUnofficial-1.10.2-3.0.6.1BETA.jar)
Contact their authors BEFORE contacting forge

// There are four lights!

Time: 8/16/16 10:26 PM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at net.minecraft.network.datasync.EntityDataManager.func_187225_a(SourceFile:116)
at net.minecraft.entity.projectile.EntityArrow.func_70241_g(SourceFile:555)
at org.blockartistry.mod.DynSurround.client.DamageEffectHandler.onLivingHurt(DamageEffectHandler.java:119)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_290_DamageEffectHandler_onLivingHurt_LivingHurtEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:72)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:168)
at net.minecraftforge.common.ForgeHooks.onLivingHurt(ForgeHooks.java:502)
at net.minecraft.entity.EntityLivingBase.func_70665_d(EntityLivingBase.java:1296)
at net.minecraft.entity.EntityLivingBase.func_70097_a(EntityLivingBase.java:890)
at com.grim3212.mc.pack.core.entity.EntityProjectile.func_184549_a(EntityProjectile.java:336)
at com.grim3212.mc.pack.core.entity.EntityProjectile.func_70071_h_(EntityProjectile.java:261)
at com.grim3212.mc.pack.tools.entity.EntityRayw.func_70071_h_(EntityRayw.java:41)
at net.minecraft.world.World.func_72866_a(World.java:1962)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:837)
at net.minecraft.world.World.func_72870_g(World.java:1932)
at net.minecraft.world.World.func_72939_s(World.java:1748)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:618)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:709)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:240)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Server thread
Stacktrace:
at net.minecraft.network.datasync.EntityDataManager.func_187225_a(SourceFile:116)
at net.minecraft.entity.projectile.EntityArrow.func_70241_g(SourceFile:555)
at org.blockartistry.mod.DynSurround.client.DamageEffectHandler.onLivingHurt(DamageEffectHandler.java:119)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_290_DamageEffectHandler_onLivingHurt_LivingHurtEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:72)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:168)
at net.minecraftforge.common.ForgeHooks.onLivingHurt(ForgeHooks.java:502)
at net.minecraft.entity.EntityLivingBase.func_70665_d(EntityLivingBase.java:1296)
at net.minecraft.entity.EntityLivingBase.func_70097_a(EntityLivingBase.java:890)
at com.grim3212.mc.pack.core.entity.EntityProjectile.func_184549_a(EntityProjectile.java:336)
at com.grim3212.mc.pack.core.entity.EntityProjectile.func_70071_h_(EntityProjectile.java:261)
at com.grim3212.mc.pack.tools.entity.EntityRayw.func_70071_h_(EntityRayw.java:41)
at net.minecraft.world.World.func_72866_a(World.java:1962)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:837)
at net.minecraft.world.World.func_72870_g(World.java:1932)

-- Entity being ticked --
Details:
Entity Type: grimpack.AdvRayShot (com.grim3212.mc.pack.tools.entity.EntityAdvRayw)
Entity ID: 197213
Entity Name: entity.grimpack.AdvRayShot.name
Entity's Exact location: -568.59, 6.20, 207.77
Entity's Block location: World: (-569,6,207), Chunk: (at 7,0,15 in -36,12; contains blocks -576,0,192 to -561,255,207), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
Entity's Momentum: 0.51, 0.02, 2.31
Entity's Passengers: []
Entity's Vehicle: ERROR NullPointerException: null
Stacktrace:
at net.minecraft.world.World.func_72939_s(World.java:1748)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:618)

-- Affected level --
Details:
Level name: TESTING
All players: 1 total; [EntityPlayerMP['Lothrazar'/26, l='TESTING', x=-582.13, y=4.00, z=146.55]]
Chunk stats: ServerChunkCache: 438 Drop: 0
Level seed: -7335415141906106677
Level generator: ID 01 - flat, ver 0. Features enabled: true
Level generator options:
Level spawn location: World: (-581,4,139), Chunk: (at 11,0,11 in -37,8; contains blocks -592,0,128 to -577,255,143), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
Level time: 1013 game time, 0 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 55676 (now: false), thunder time: 92754 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:709)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:240)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
Minecraft Version: 1.10.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 461169872 bytes (439 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.32 Powered by Forge 12.18.1.2061 Optifine OptiFine_1.10.2_HD_U_C2 60 mods loaded, 60 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA mcp{9.19} Minecraft Coder Pack
UCHIJAAAA FML{8.0.99.99} Forge Mod Loader
UCHIJAAAA Forge{12.18.1.2061} Minecraft Forge
UCHIJAAAA lazAnvils{1.2.1.3} Anvil Enchantments
UCHIJAAAA JEI{3.8.1.243} Just Enough Items
UCHIJAAAA AppleCore{2.0.0} AppleCore
UCHIJAAAA appleskin{1.0.1} AppleSkin
UCHIJAAAA arrowcammod{2.2.0} Arrow Cam Mod
UCHIJAAAA betterbuilderswands{0.6.5} Better Builder's Wands
UCHIJAAAA bettercombatmod{1.3.0} Better Combat
UCHIJAAAA BetterFoliage{2.1.0} Better Foliage
UCHIJAAAA Chameleon{1.10-2.1.7} Chameleon
UCHIJAAAA ChunkAnimator{1.2} Chunk Animator
UCHIJAAAA combathelp{1.0.3} Combat Help
UCHIJAAAA MineTweaker3{3.0.10} MineTweaker 3
UCHIJAAAA cs{1.0.2} Configurable Villager to Door Ratio
UCHIJAAAA wonderfulwands{2.2.0} Wonderful Wands
UCHIJAAAA cyclicmagic{1.5.2} Cyclic
UCHIJAAAA Ding{MC1.9.0v2} Ding
UCHIJAAAA disenchanter{1.4} Disenchanter
UCHIJAAAA lootablebodies{2.2.0} DrCyano's Lootable Bodies
UCHIJAAAA dsurroundunofficial{3.0.6.1BETA} Dynamic Surroundings Unofficial
UCHIJAAAA EnderZoo{1.10-1.2.3.43} Ender Zoo
UCHIJAAAA FastLeaveDecay{1.1} Fast Leave Decay
UCHIJAAAA forgecreeperheal{1.3.0} Forge Creeper Heal
UCHIJAAAA GlobalGameRules{1.0} Global GameRules
UCHIJAAAA grapple_hooks{1.0.8} Grapple Hooks
UCHIJAAAA grimpack{3.4.4.13} [Grim Pack](Grim Pack-1.10.2-3.4.4.13.jar)
UCHIJAAAA HoloInventory{2.0.1.135} HoloInventory
UCHIJAAAA InfernalMobs{1.7.1} Infernal Mobs
UCHIJAAAA inventorytweaks{1.61-58-a1fd884} Inventory Tweaks
UCHIJAAAA journeymap{1.10.2-5.2.4} JourneyMap
UCHIJAAAA jeresources{0.4.9.50} Just Enough Resources
UCHIJAAAA kleeslabs{3.3.1} KleeSlabs
UCHIJAAAA LunatriusCore{1.1.2.36} LunatriusCore
UCHIJAAAA LaserLevel{2.1.0.13} Laser Level
UCHIJAAAA lteleporters{1.1.3} Lemon's Simple Teleporters
UCHIJAAAA malisiscore{1.9.4-4.1.1} MalisisCore
UCHIJAAAA malisisdoors{1.9.4-5.0.3} MalisisDoors
UCHIJAAAA mineTunes{1.2-9} [mineTunes](MineTunes 1.2-9.jar)
UCHIJAAAA ModLister{1.10-2.1.6} ModLister
UCHIJAAAA powerinventory{2.2.2} Overpowered Inventory
UCHIJAAAA PersistentBits{1.0.3} Persistent Bits
UCHIJAAAA progressiveautomation{1.6.49} Progressive Automation
UCHIJAAAA ProjectE{1.9.4-PE1.0.5B} ProjectE
UCHIJAAAA Quark{r1.0-51} Quark
UCHIJAAAA recallstones{0.6.3} Recall Stones
UCHIJAAAA xreliquary{1.10.2-1.3.3.467} Reliquary
UCHIJAAAA roots{0.111} Roots
UCHIJAAAA Schematica{1.7.8.151} Schematica
UCHIJAAAA SimilsaxTranstructors{1.10.2.18} Similsax Transtructors
UCHIJAAAA SophisticatedWolves{3.6.1} SophisticatedWolves
UCHIJAAAA soundfilters{0.9_for_1.9} Sound Filters
UCHIJAAAA Stackie{1.6.0.44} Stackie
UCHIJAAAA StorageDrawers{1.10.2-3.2.4} Storage Drawers
UCHIJAAAA supercraftingframe{1.2.0.85} Super Crafting Frame
UCHIJAAAA VeinMiner{0.34.1_1.9-73be663} Vein Miner
UCHIJAAAA VeinMinerModSupport{0.34.1_1.9-73be663} Mod Support
UCHIJAAAA vc{v0.2.9b-mc1.10.2} ViesCraft
UCHIJAAAA villagebox{0.5.0} Village Box
Loaded coremods (and transformers):
BetterFoliageLoader (BetterFoliage-MC1.10-2.1.0.jar)
mods.betterfoliage.loader.BetterFoliageTransformer
LoadingPlugin (Quark-r1.0-51.jar)
vazkii.quark.base.asm.ClassTransformer
AppleCore (AppleCore-mc1.10.2-2.0.0.jar)
squeek.applecore.asm.TransformerModuleHandler
LoadingPlugin (ChunkAnimator-MC1.9.4-1.2.jar)
lumien.chunkanimator.asm.ClassTransformer
FMLPlugin (InventoryTweaks-1.61-58.jar)
invtweaks.forge.asm.ContainerTransformer
MalisisCorePlugin (malisiscore-1.9.4-4.1.1.jar)
net.malisis.core.util.chunkcollision.ChunkCollisionTransformer
net.malisis.core.util.chunkblock.ChunkBlockTransformer
net.malisis.core.renderer.transformer.MalisisRendererTransformer
net.malisis.core.renderer.icon.asm.TextureMapTransformer
net.malisis.core.util.clientnotif.ClientNotifTransformer
dsurroundcore_unofficial (DynamicSurroundingsUnofficial-1.10.2-3.0.6.1BETA.jar)
org.blockartistry.mod.DynSurround.asm.Transformer
GL info: ERROR RuntimeException: No OpenGL context found in the current thread.
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [EntityPlayerMP['Lothrazar'/26, l='TESTING', x=-582.13, y=4.00, z=146.55]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'
OptiFine Version: OptiFine_1.10.2_HD_U_C2
Render Distance Chunks: 8
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 3.3.0
OpenGlRenderer: GeForce 9500 GS/PCIe/SSE2
OpenGlVendor: NVIDIA Corporation
CpuCount: 4

Nevermind, actually looking at the logs, DynamicSurroundings has an error before your mod does.

Sure enough, once I remove the mod file "DynamicSurroundingsUnofficial-1.10.2-3.0.6.1BETA" , the raygun no longer crashes the game!

So i cross- reported it to their devvs as wel

https://minecraft.curseforge.com/projects/dynamic-surroundings-unofficial/issues/4

Well I agree that it also looks like it is on their end. So I'll close this for right now unless it turns out its on my end.

This may have actually been fixed with 3f2f03c