[INOV] Tellarknight Vatlamyus

2 Level 4 "tellarknight" monsters
All face-up monsters on the field become DARK. You can detach 1 Xyz Material from this card, then discard 1 card; Special Summon from your Extra Deck, 1 LIGHT "tellarknight" Xyz Monster, by using this face-up card you control as the Xyz Material, also you cannot Xyz Summon for the rest of this turn. (This is treated as an Xyz Summon. Xyz Materials attached to this card also become Xyz Materials on the Summoned monster.) This effect can be activated during either player's turn, if you have 7 or more "tellarknight" monsters with different names in your Graveyard.