SR Super Rare Fusion Gate X SPELL Field During the Main Phase: The turn player can Fusion Summon 1 Fusion Monster from their Extra Deck, by banishing Fusion Materials mentioned on it from their hand or field
Special Summon them in Defense Position, but their Levels become 1 and their effects are negated, also you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except Synchro Monsters
Set that target, but place it on the bottom of the Deck when it leaves the field
Ardenn, Intrepid Archaeologist also says you can eliminate the best blocker with Pacifism, and you can save sweet auras like Staggering Insight that are attached to a creature you need to sacrifice
Due to this, players who wanted to collect all 100 cards had a hard time and WotC introduced a Buy-Back program, where players could send in 100 copies of their duplicates for cash (Source)