Katara, Waterbending Master

Lifelink
Tidal Flow — Whenever you cast a noncreature spell, you may gain 3 life
Waterbending Mastery — Pay 2: Choose one —
Tap or untap target creature (Water Manipulation)
Prevent all combat damage that would be dealt to target creature (Healing Waters).
Return target nonland permanent to its owner's hand (Water Surge).
"I will never, ever turn my back on people who need me."