Fireball Vending Machine

{1}{r}{t}: Gain 1 Fireball token with -target creature(s) takes 2 damage (divided amongst targets).
{3}{r}{t}: Gain 1 Fireball token with -target creature(s) takes 6 damage (divided amongst targets).
{5}{r}{t}: Gain 1 Fireball token with -target creature(s) takes 10 damage (divided amongst targets).
All tokens are single use and expended after use.