
Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on this creature.
Mold Adder has 2 printings, first in Magic 2010 (2009). EDHREC ranks it #14,758 among Commander cards. It appears most in Aphelia, Viper Whisperer decks (945 on EDHREC). It has 2 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.