Mold Adder

Oracle Text

Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on Mold Adder.

Card Rulings

10/1/2009 If an opponent casts a blue or black spell, Mold Adder’s ability triggers and is put on the stack on top of that spell. Mold Adder’s ability will resolve before the spell does.
10/1/2009 If an opponent casts a spell that’s both blue and black, Mold Adder’s ability triggers only once.