Icefall Regent [Dragons of Tarkir] Troll Ninja Water Rarity: Uncommon Retreat cost:

Water Rarity: Uncommon Retreat cost: Colorless

by sun or moon

Whenever Goreclaw

Set: Fossil 1st Edition Type: Lightning Rarity: Rare Retreat cost: Colorless

but it does have a few constants

Icefall Regent [Dragons of Tarkir] Troll Ninja Water Rarity: Uncommon Retreat cost:Set: Dragons of Tarkir Type: Creature Dragon Rarity: Rare Cost: {3}{U}{U} Flying When Icefall Regent enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Icefall Regent. Spells your opponents cast that target Icefall Regent cost {2} more to cast.