Executor's Medallion

Executor's Medallion enters play tapped.

{t}: Add {u} or {b}.

{2}{u/b}, {t}, Sacrifice Executor's Medallion:
You may put a -1/-1 counter on each of X
different creatures you control. If you do,
target creature you control gets +X/+X
until end of turn. Activate only as a sorcery.