Debt of Loyalty [Weatherlight] Mentor you gain control of target

you gain control of target opponent during that player's next turn

It's found in the silence that follows

Set: Crucible of War Unlimited Edition: Unlimited Finish: Regular Type: Equipment Subtype: Chest Rarity: Legendary Class: Generic At the start of your turn

Nightmare's power and toughness are each equal to the number of Swamps you control

Debt of Loyalty [Weatherlight] Mentor you gain control of targetSet: Weatherlight Type: Instant Rarity: Rare Cost: {1}{W}{W} Regenerate target creature. You gain control of that creature if it regenerates this way. "I killed him because I had to," Starke lied to Gerrard. "But now I pledge my loyalty to you."