Criatura — Víbora hongo
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Siempre que un oponente lance un hechizo azul o negro, puedes poner un contador +1/+1 sobre la Culebra del moho.
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.