Modify current mob health minecraft

Question

Is there any way to add/remove health after an entity has been created? For example, I'd like to have a X mob regenerate Y "hearts" when Z happens. Thanks for any help in advance.

Answer 1

There are two ways. Using MCP obfuscation mappings, the first and proper way to do so is with:

EntityLiving.attackEntityFrom(DamageSource, damageDealt);

You need to specify where the damage came from in the first parameter though, so the simpler one is to simply use:

EntityLiving.setEntityHealth(health);

Use this with getHealth so you can do stuff like entity.setEntityHealth(entity.getHealth() - 1);