Uh, Squen & Cragg Made a Card
Enchantment
+1/+1 counters give −1/−1 and −1/−1 counters give +1/+1. (They're still +1/+1 and −1/−1 counters. The effects are just backwards.)
Not legal in Commander
Enchantment
+1/+1 counters give −1/−1 and −1/−1 counters give +1/+1. (They're still +1/+1 and −1/−1 counters. The effects are just backwards.)
Not legal in Commander