Rot Emissary

Attacking creatures get +1/+0
for each counter on Rot Emissary.
Whenever one or more infection counters
are added, put a +1/+1 counter on Rot Emissary.
Creatures you control have Menace.
When the Rot Emissary arrived, the inhabitants of
the Upside Down were riled up and unified.
Something was coming shortly thereafter...