Final Flash

Beam struggle 3 (Add 3 to X during a beam struggle)

Deal X damage to any target. If this spell was cast
from exile, deal 2 times X damage to any target instead, it can't be countered and the damage
can't be prevented.

Suspend X-{x}{b/r} (Rather than cast this card from
your hand, you may pay {x}{b/r} and exile it with {x}time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast
it without paying it's mana cost.)