Nova/Armadillo mod: (1) Are triggered abilities like the Hero Action on The Search for Spiral considered performed by the…

Question

(1) Are triggered abilities like the Hero Action on The Search for Spiral considered performed by the player’s identity who resolves the ability? Is it “yes” because Nova can trigger Unleash Nova Force after emptying Search with it? > (2) What kind(s) of triggered abilities on encounter cards are considered to be performed by the ID of the player who triggers them? Is this only true of a “Hero Action”? Would it also be true of an “Action”? Would it be true for any kinds of Interrupts or Responses? > (3) I’ve heard that “The Hero Action on The Search for Spiral should be a cost.” Should we consider this an errata to the card? How should it read?

Erratum