Viper's Grudge

Your non-Reptile monsters cannot attack or activate their effects. You can only use each of the following effects of "Viper's Grudge" once per turn. If a face-up Reptile monster(s) you control is destroyed by battle or sent to the GY: You can Special Summon 1 Level 4 or lower Reptile monster from your Deck. If this card in the Spell & Trap Zone is destroyed: You can return all your banished Reptile monsters to the GY.