$0.12 @ TCGplayer
Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on this creature.
If an opponent casts a spell that's both blue and black, Mold Adder's ability triggers only once.
Mold Adder's ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered or otherwise leaves the stack without resolving.
