Artifact Creature — Myr
At the beginning of your upkeep, put a +1/+1 counter on Myr Prototype.
Myr Prototype can't attack or block unless you pay for each +1/+1 counter on it.
イラスト：Dave Dorman
for each +1/+1 counter on it.
Mirrodin#214アンコモン英語
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