Black Cat
If this is in your hand after the turn, discard it.
Mirage
On Reveal: Copy the lowest-Cost card in your opponent's hand into your hand. Give it +2 Power.
Sebastian Shaw
When this card permanently gains Power, gain +2 more Power. (wherever this is)
Selene
On Reveal: Afflict the lowest-Power card in each player's hand
with -3 Power.