Protection from red Elemental creatures you control get +1/+1. When this creature enters, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue.
Enchant creature Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice this Aura. When you sacrifice this Aura, draw two cards.
This creature can't attack unless defending player controls an Island. {5}{U}{U}: Monstrosity 3. When this creature becomes monstrous, target land becomes an Island in addition to its other types.
{6}{U}{U}: Monstrosity 4. When this creature becomes monstrous, tap up to four target creatures. Those creatures don't untap during their controllers' untap steps for as long as you control this creature.
Indestructible As long as your devotion to blue is less than five, Thassa isn't a creature. At the beginning of your upkeep, scry 1. {1}{U}: Target creature you control can't be blocked this turn.
At sunrise, the Champion and her companions awoke to find their supplies gone and Brygus, their sentry, dead. Carefully arranged piles of ornamental shells gave a clear warning: go no further. —The Theriad
Up to two target creatures each get +0/+3 until end of turn. Untap those creatures. At this turn's next end of combat, tap each creature that was blocked by one of those creatures this turn and it doesn't untap during its controller's next untap step.
Heroic — Whenever you cast a spell that targets this creature, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.
Flying When this creature enters, create a number of 1/1 black Harpy creature tokens with flying equal to your devotion to black. At the beginning of your upkeep, sacrifice a creature.