Cursed and Forsaken City

When Contamination Cursed City enters the
battlefield, put a -1/-1 counter on 2 creatures you
control. If you cannot, you get 1 poison counter.
{t} Add {g} or {b}.
{1}{b}{g}{t}: Put a -1/-1 counter on target creature
or give 1 poison counter to target player. If there
are three counters, transform Cursed and
Forsaken City this to Ark of Contagion
"We are Undead, no disease can afflict our holy state." - Unconcerned Legionaire