Katara, Water's Master

Lifelink

If Katara, Water's Master is untapped, creatures
your opponents control don't untap.

{x}{t}: Regenerate X target creatures. X cannot be paid for with colorless mana.

{g/u}{g/w}{w/u}{t}: Tap all creatures target opponent controls.

"I will never, ever, turn my back on people who need
me."