Enneacraft Reverth - Phantom Revenge (PHRE)

Shuffle any number of "Enneacraft" Monster Cards from your hand and/or face-up field into the Deck/Extra Deck, then draw cards equal to the number shuffled. If your opponent Normal or Special Summons a monster(s), while this card is in your GY (except during the Damage Step): You can banish this card and activate 1 of these effects;
• Special Summon 1 "Enneacraft" monster from your hand in face-down Defense Position.
• Change 1 face-down Defense Position "Enneacraft" monster you control to face-up Defense Position.
You can only activate 1 "Enneacraft Reverth" per turn.