Nils, Discipline Enforcer is a bit less admired than the other Silverquill professor
If you do add a card this way, you send the targeted card to the Graveyard, but if you don't, you get to keep the card you targeted
Its not their collection
K9-EW Special Release Experiment X TRAP Special Summon 1 "K9" monster from your hand or GY, then you can Special Summon 1 "K9" Xyz Monster from your Extra Deck, by using that monster as material (this is treated as an Xyz Summon), but destroy the monster Special Summoned from the Extra Deck, during the End Phase of the next turn
Thanks to the increased collectibility of these Final Fantasy promos, they could be worth even more
How to Counter Uncle Ben To prevent Uncle Ben from summoning Spider-Man, focus on disabling the enemy's destroyer cards