Executor's Medallion

Executor's Medallion enters play tapped.

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

{1}{u/b}, {t}, Sacrifice Executor's Medallion:
Put a -1/-1 counter on any number of different
creatures you control. Target creature gets +1/+1
until end of turn for each counter placed this way.
Activate only as a sorcery.