Checking target legality (esp for removal)
You can change the power of the creature targeted by Smite the Monstrous to make it an illegal target. However, a buff effect like Giant Growth won't help there because Smite the Monstrous targets a creature with &quot;power 4 or greater&quot;; if a creature is already a valid target when the spell was cast, increasing its power with Giant Growth won't change that. You would need to decrease its power to less than 4 to make the target illegal. Befuddle, for example, would do it if the creature starts out with power 7 or less.