Harry Potter

+4: Put a +2/+2 counter on up to 2 creatures. ( you may put 2 +2/+2 counters on 1 creature instead.)
-4: Create a 5/5 Firebolt creature token with flying.
-18: Create an emblem with hexproof, and "Whenever a creature or plainswalker you control is destroyed, you win the game."