onEntityAttack
, че-то такое.LivingEntity#addPotionEffect
//Bukkit, Forge
public static ItemStack enchant(ItemStack itemStack, Enchantment ench, int lvl) {
itemStack.addEnchantment(ench,lvl);
return itemStack;
}
onEntityAttack
, че-то такое.LivingEntity#addPotionEffect