Aang, Airbender

Flying, Vigilance
The first time you cast a blue, white, or green
spell per turn, gain life equal to half the card's
mana cost rounded up.
Whenever Aang, Airbender attacks, you may tap
or untap target creature.
{3}{w}{u}{g}: Exile Aang, Airbender, then return
him to the battlefield transformed. Activate this
ability only if you control Katara, Waterbender.
Partner