Venom Symbiote

Symbioses (You may flip a coin to see if you can
attach Venom, the Symbiote to target creature.
If you flip heads, you preform Symbioses.
If you flip tails, Venom, the Symbiote rejects the
target creature and they can't preform Symbioses
together.)
If you successfully achieve symbiosis, create a
Black creature token copy of the attached
creature, with Infect. Sacrifice the token at your
endstep.