- additional resistance (accept negative value)
- additional max health
- attack speed modifier (like target_movement_modifier, but affects attack speed rather than movement speed. 0 = cannot attack)
- crafting speed modifier (0 = cannot handcraft)
- vision distance modifier (0 = complete blind)
- light (make the entity glow )
- repeated action, just like poison-cloud. Useful for creating smoke effect on the target.
And hopefully the stun effect mentioned in FFF #169 can also be applied on structures (especially turrets).