USS Guam

Haste
Whenever USS Guam attacks, you may reveal the top card
of your library. If you do, deal damage equal to that card’s
mana value to target creature. You may also discard a card.
If you do, deal damage equal to the discarded card’s mana
value to target creature. You may also sacrifice a
creature. If you do, deal damage equal to the
sacrificed creature’s mana value to target creature.

{r}{r}{r}{r}{r}, {t}, Sacrifice USS Guam: Deal 20 damage to
target creature and 10 damage to another ta