Thassa, Deep-Dwelling [Theros Beyond Death] XY187 cards on your field is

cards on your field is equal to or less than the number on your opponent's field and you have 5 or less cards in your hand

Lightning Rarity: Ultra Rare Retreat cost: 0

VIAL SMASHER THE FIERCE DEALS DAMAGE EQUAL TO THAT SPELL'S MANA VALUE TO THAT PLAYER OR A PLANESWALKER THAT PLAYER CONTROLS

To master the challenges and achieve your mission

Set: Bloomburrow Type: Creature — Elemental Snake Rarity: Mythic Cost: {5}{B} As an additional cost to cast this spell

Thassa, Deep-Dwelling [Theros Beyond Death] XY187 cards on your field isSet: Theros Beyond Death Type: Legendary Enchantment Creature God Rarity: Mythic Cost: {3}{U} Indestructible As long as your devotion to blue is less than five, Thassa isn't a creature. At the beginning of your end step, exile up to one other target creature you control, then return that card to the battlefield under your control. {3}{U}: Tap another target creature.