I think many of you are looking at this card from a different angle - for me this card says "put a mildly annoying encounter card into the set of Ronan, Nebula, Venom Goblin, Thanos etc." the thing about minions is even if they hit you with quickstrike or ability they are usually easy to clear the turn they show up and compared to some very annoying encounter cards are not doing much. it was funny when I first got hit by shadow of the past in the first turn on Ronan and I realised that cards that i put into villain deck are much weaker than his own cards.
TLDR - put easy card into villain deck - good!