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'Choose one —
• Target creature gets -X/-X until end of turn. You gain X life.
• Exile up to twice X target cards from graveyards.
'Counter target spell unless its controller pays {X}, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to...
'{3}{U}: You may tap or untap target creature.
'When this creature enters, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your...
'When this creature enters, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your...
'When this creature enters, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your...
'Counter target spell unless its controller pays {X}, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to...
'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...
'Draw three cards. Target player mills three cards.
'Bestow {5}{U} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Whenever this creature...
'Draw three cards. Target player mills three cards.
'Permanents you control gain hexproof and indestructible until end of turn.