Lord admiral, Jaina Proudmoore

Flash

When this card enters the battlefield, you may
tap up to X amount of creatures, where X is
your devotion to blue. Then create 3 1/1 Water Elementals.

Creatures you control gain "{t}, Add one {u}
mana to your mana pool."

"I'm sorry, Arthas. I can't watch you do this..."- Jaina Proudmoore