Seaking (59/147) [Aquapolis]Set: Aquapolis Type: Water Rarity: Uncommon Retreat cost: Colorless

Set: Beta Edition Type: Artifact Rarity: Uncommon Cost: {1} Whenever a creature dies

Whenever Skullbriar

As long as enchanted artifact isn't a creature

Set: Portal Type: Sorcery Rarity: Rare Cost: {1}{R} Pyroclasm deals 2 damage to each creature

Set: Junior Series Europe Type: Creature — Phoenix Rarity: Rare Cost: {4}{R} Flying (This creature can't be blocked except by creatures with flying or reach

Lord of Leaves

If he can't leave Ixalan

Set: XY: Base Set Type: Darkness Rarity: Ultra Rare Retreat cost: Colorless

Set: XY: BREAKpoint Type: Grass Rarity: Promo Retreat cost: Colorless

and Serpents you control can't be blocked except by Krakens

if you control five or more artifacts

Set: Secret Lair Drop Series Type: Basic Snow Land — Island Rarity: Rare ({T}: Add {U}