Bi-entity Action Types
Bi-entity action types operate on a Pair<Entity, Entity> or in simpler terms: an 'actor' and a 'target'. The 'actor' and the 'target' is determined by the used power type and can be swapped. These are available to power/action types that provides a bientity_action object field.
As a rule of thumb, the 'actor' is usually the entity that invoked the action (e.g: uses or attacks an entity) while the 'target' is the entity being targeted (e.g: the entity being used or attacked).
Note
See the documentation for Origins/Apoli's bi-entity action types for a list of bi-entity action types added by Origins/Apoli.