Gladiator
On Reveal: Add a card from your opponent's deck to their side of this location. If it has less Power, destroy it.
Grand Master
On Reveal: Move one of your other On Reveal cards here to the middle location. Its ability happens again.
Loki
On Reveal: Transform your hand into cards from your opponent's starting deck and give them -1 Cost.
M'Baku
At the end of the game, this jumps from your deck to your lowest-Power location. (that isn't full)
Mirage
On Reveal: Copy the lowest-Cost card in your opponent's hand into your hand. Give it +2 Power.