Using the spectral mantle cape should disable the ability to click(left and right) with items because, When an entity is attacked with the beam (created by left clicking), it crashes. Also the crash bellow does not happen with all mobs.

Also lycanite has a diagnosis for the problem:https://github.com/Lycanite/LycanitesMobs/issues/103#issuecomment-109896787
(original problem before I experimented/tested more)

Versions:
Botania:1.9.1
Baubles:1.0.1.10
Thuamcraft:4.2.3.5
Travelers Gear:1.16.5
Witching Gadgets:1.1.9

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 6/7/15 11:18 AM
Description: Ticking entity

java.lang.ClassCastException: net.minecraft.entity.passive.EntityBat cannot be cast to net.minecraft.entity.EntityCreature
at witchinggadgets.common.items.baubles.ItemCloak.onUserTargeted(ItemCloak.java:395)
at travellersgear.common.util.TGEventHandler.triggerItemEvent(TGEventHandler.java:356)
at travellersgear.common.util.TGEventHandler.triggerGear(TGEventHandler.java:325)
at travellersgear.common.util.TGEventHandler.onPlayerTargeted(TGEventHandler.java:198)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_150_TGEventHandler_onPlayerTargeted_LivingSetAttackTargetEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138)
at net.minecraftforge.common.ForgeHooks.onLivingSetAttackTarget(ForgeHooks.java:282)
at net.minecraft.entity.EntityLivingBase.func_70604_c(EntityLivingBase.java:379)
at net.minecraft.entity.EntityLivingBase.func_70097_a(EntityLivingBase.java:796)
at net.minecraft.entity.passive.EntityBat.func_70097_a(SourceFile:199)
at vazkii.botania.common.item.relic.ItemExcaliber.updateBurst(ItemExcaliber.java:202)
at vazkii.botania.common.entity.EntityManaBurst.func_70071_h_(EntityManaBurst.java:364)
at net.minecraft.world.World.func_72866_a(World.java:2070)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:648)
at net.minecraft.world.World.func_72870_g(World.java:2034)
at net.minecraft.world.World.func_72939_s(World.java:1887)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:636)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

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

-- Head --
Stacktrace:
at witchinggadgets.common.items.baubles.ItemCloak.onUserTargeted(ItemCloak.java:395)
at travellersgear.common.util.TGEventHandler.triggerItemEvent(TGEventHandler.java:356)
at travellersgear.common.util.TGEventHandler.triggerGear(TGEventHandler.java:325)
at travellersgear.common.util.TGEventHandler.onPlayerTargeted(TGEventHandler.java:198)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_150_TGEventHandler_onPlayerTargeted_LivingSetAttackTargetEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138)
at net.minecraftforge.common.ForgeHooks.onLivingSetAttackTarget(ForgeHooks.java:282)
at net.minecraft.entity.EntityLivingBase.func_70604_c(EntityLivingBase.java:379)
at net.minecraft.entity.EntityLivingBase.func_70097_a(EntityLivingBase.java:796)
at net.minecraft.entity.passive.EntityBat.func_70097_a(SourceFile:199)
at vazkii.botania.common.item.relic.ItemExcaliber.updateBurst(ItemExcaliber.java:202)
at vazkii.botania.common.entity.EntityManaBurst.func_70071_h_(EntityManaBurst.java:364)
at net.minecraft.world.World.func_72866_a(World.java:2070)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:648)
at net.minecraft.world.World.func_72870_g(World.java:2034)

-- Entity being ticked --
Details:
Entity Type: Botania.botania:manaBurst (vazkii.botania.common.entity.EntityManaBurst)
Entity ID: 328580
Entity Name: Mana Burst
Entity's Exact location: 681.76, 6.32, -414.25
Entity's Block location: World: (681,6,-415), Chunk: (at 9,0,1 in 42,-26; contains blocks 672,0,-416 to 687,255,-401), Region: (1,-1; contains chunks 32,-32 to 63,-1, blocks 512,0,-512 to 1023,255,-1)
Entity's Momentum: 0.65, 0.15, 1.23
Stacktrace:
at net.minecraft.world.World.func_72939_s(World.java:1887)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489)

-- Affected level --
Details:
Level name: world for crashes
All players: 1 total; [EntityPlayerMP['KidWither'/192, l='world for crashes', x=680.86, y=4.50, z=-416.62]]
Chunk stats: ServerChunkCache: 471 Drop: 0
Level seed: 2121095848396880586
Level generator: ID 01 - flat, ver 0. Features enabled: true
Level generator options:
Level spawn location: World: (601,4,-283), Chunk: (at 9,0,5 in 37,-18; contains blocks 592,0,-288 to 607,255,-273), Region: (1,-1; contains chunks 32,-32 to 63,-1, blocks 512,0,-512 to 1023,255,-1)
Level time: 5766 game time, 5766 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 77473 (now: false), thunder time: 168942 (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:636)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Mac OS X (x86_64) version 10.10.3
Java Version: 1.8.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 228142496 bytes (217 MB) / 480223232 bytes (457 MB) up to 2083782656 bytes (1987 MB)
JVM Flags: 5 total; -Xmx2000M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.85.1291 Minecraft Forge 10.13.2.1291 9 mods loaded, 9 mods active
mcp{9.05} Minecraft Coder Pack Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{7.10.85.1291} Forge Mod Loader Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{10.13.2.1291} Minecraft Forge Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
WitchingGadgetsCore{1.1.9} Witching Gadgets Core Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Baubles{1.0.1.10} Baubles Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Thaumcraft{4.2.3.5} Thaumcraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Botania{r1.6-191} [Botania](Botania r1.6-191.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
TravellersGear{1.16.5} Traveller's Gear Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
WitchingGadgets{1.1.9} Witching Gadgets Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['KidWither'/192, l='world for crashes', x=680.86, y=4.50, z=-416.62]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

I'll look into it

I did update botania to version 1.9.2 and still get the crash(made sure it still was reproducible with the the latest version of botania).