it just crashes my world after I morphed to a creeper
I don't mean whole Minecraft crashed so theres no crash report, it just won't let me play on my world

This issue is being closed as a purge of issues due to the Morph rewrite to 1.12.2 finally being released. Support for the 1.7.10 version has long been dropped and focus has shifted to the 1.12.2 version of the mod instead.

Show your fml-client-latest.log file after the issue happens. Don't send it after restarting Minecraft or the file gets wiped. Use pastebin or gist.

do you mean this thing? https://pastebin.com/7eyj19QM

EDIT:I added 2 new mods, animated player and animationapi

Could you try removing optifine? For some reason the log isnt showing everything like it should but I see you've got optifine installed which is known to have issues with Morph.

optifine? the one thing keeping me away from like 17 fps?

its out

does the issue still occur without optifine?

nope

Same issue here. But I'm not willing to remove optifine seeing as Ichun has said that he's working on the issue to some degree.