Katara

Vigilance, Lifelink, Islandwalk
{w/u}{w/u}{t}: Gain 3 life.
{u}{p/b}{p/b}, {t}: Gain control of target creature until
end of turn. Untap that creature. It gains haste
until end of turn.
({p/b} can be paid with either {b} or 2 life.)