Trap Gatherer

The equipped monster gains 400 ATK for each Trap in your GY. You can only use each of the following effects of "Trap Gatherer" once per turn. After damage calculation, when the equipped monster destroys an opponent's monster by battle or inflicts battle damage to them: You can send this card to the GY; Set 1 Trap from your GY. If a face-up Trap(s) you control would be destroyed by card effect, you can banish this card you control instead.