Felix, Soda Alchemist

Whenever you cast a creature spell, you may pay {g}. If you do, create a Food token and gain 1 life.
{1}{g}, Sacrifice three Food tokens: Target creature
gains trample and +3/+3 until end of turn.
Bubbling vials, verdant elixirs—Felix's cart holds more
than potions; it holds the promise of effervescent magic.