The Giving Tree

(The Giving tree isn't a spell, it's affected by
summoning sickness, and it has "{t}: Add {g} to
your mana pool.")
{t}{g}: Target creature you control get +2/+2
until end of turn.
{t}{g}{g}: Sacrifice The Giving Tree, create two
green 2/2 Living Roots creature tokens with
lifelink.