CardName: Once and for All
Cost: R
Type: Instant
Pow/Tgh: /
Rules Text: Damage can’t be prevented this turn.
Choose target creature you control and target creature an
opponent controls. Each deals damage equal to its power to
the other. Repeat this process until one of them has lethal
damage marked on it.
Flavour Text:
Set/Rarity: Shiny Umbreon's Unmade Cards Rare
Once and for All
R
Instant
Damage can’t be prevented this turn.
Choose target creature you control and target creature an opponent controls. Each deals damage equal to its power to the other. Repeat this process until one of them has lethal damage marked on it.
Awkward wording because SBEs wouldn't happen at the middle of this spell's resolution.