Oil Golem

Severe weakness when fighting red creatures:
When Oil Golem is attacking red creatures, they
gain first strike and Oil Golem's toughness reverts
to 2, despite counters.
{2}{b}{g}, {t}: Exile target creature. Its controller
gets a Sludge Token under their control.
{3}{b}{g}, Exile Oil Golem: Place a -1/-1 counter
on a creature you control, create a Sludge Token.