When Revealed: Each player reveals a random set-aside Thunderbolt minion. Reveal and attach the remaining set-aside Thunderbolt minion faceup here. In expert mode, give each of these minions a tough status card. Flip this card.

(The minion attached here is in play and can be targeted by attacks and abilities.)

Forced Interrupt: When the round ends, attach the Thunderbolt minion with the most damage here, swapping it with the minion already attached here, if any. Heal 1 damage from attached minion. In expert mode, heal 1 additional damage from that minion and give it a tough status card.