Little Ol' Farm

Landfall — Whenever a land enters the
battlefield under your control, create a Food
token. If that land is a Plains, create two Food
tokens instead. (It's an artifact with "{2}, {t},
Sacrifice this artifact: You gain 3 life.")
Sacrifice three Foods: Create a Treasure. (It's an
artifact with "{t}, Sacrifice this artifact: Add one
mana of any color.")