Sonic.Exe

Reach, Deathtouch
When attacked or blocked, pay {x} mana, or tap Hill Act I to equal {10} mana, create a zombie token with X power and toughness.
When you deal player damage, pay {x} mana, and every turn, that player adds 1 EXE token. If that player's EXE tokens are equal to 15-X, deal 1 damage per 3 EXE tokens that are on that player per turn rounded down. Do not stop adding tokens.
You're too slow. Want to try again? - Sonic.exe, by MY5TCrimson