Warrior's Oath [Portal Three Kingdoms] XY93 and it has “{2}{U}{U}: Return

and it has “{2}{U}{U}: Return this creature to its owner's hand at the beginning of the next end step

Set: Sword & Shield: Crown Zenith Type: Grass Rarity: Secret Rare Retreat cost: Colorless

Drain Life — When Shard of the Nightbringer enters the battlefield

Exile Soul of Mirrodin from your graveyard

Put a +1/+1 counter on that creature for each nonland card discarded this way

Warrior's Oath [Portal Three Kingdoms] XY93 and it has “{2}{U}{U}: ReturnSet: Portal Three Kingdoms Type: Sorcery Rarity: Rare Cost: {R}{R} Take an extra turn after this one. At the beginning of that turn's end step, you lose the game. "If I fail, my head is yours." Warrior's oath common during the Three Kingdoms period