Rocket, Trash Tactician

At the beginning of your first main phase,
add {r} or {g} for each Raccoon you control.
Whenever you expend 4, you gain 3 life.
(You expend 4 as you spend your fourth total
mana to cast spells during a turn.)
Whenever you expend 8, exile the top two
cards of your library. Until the end of your
next turn, you may play those cards.