Furina, Chanson of Many Waters

Furina's Toughness is equal to your devotion to blue.

{t},{u}{u}: Tap Furina. All creatures you control gain
+0/+X until the end of turn where (X) is equal to Furina's Toughness. You gain life equal to Furina's Toughness.

{t},{u}{u}: Tap Furina. Create 3 X/X blue Elemental creature tokens with haste that are attacking. X is equal to Furina's toughness. Sacrifice them at the end of turn.

"What a desolate sight... Allow me to grant you the blessing of water!"