at the beginning of your upkeep, put a +1/+1 counter on myr prototype.
myr prototype can't attack or block unless you pay 1 for each +1/+1 counter on it.
Myr Prototype prices from Mirrodin
Myr Prototype from Mirrodin's Price Analysis
Login or Create an Account to see more Price Details
Track your Collection
Multiple apps and weekly email reports!
