Mold Adder
From Foundations set


Mold Adder
Creature — Fungus Snake
1/1
Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on this creature.
Rulings
- 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.
- If an opponent casts a spell that's both blue and black, Mold Adder's ability triggers only once.