Deranged Corprus

When Deranged Corprus enters the battlefield, you may give it either first strike or haste. If you don't, give it a +1/+1 counter.

Blight (When this creature does non-lethal combat damage to another creature, flip a coin. If heads, that creature receives a -1/-1 counter at the beginning of its controller's next upkeep; if tails, nothing happens.)