The first fake card I encountered was a beta Lotus back in 1998
Its power is tied to its cheap cost and wide range of abilities that are useful throughout a match, especially against decks that mill cards
(Equipment, Auras you control, and counters are modifications.) If the creature you control is an illegal target as Signature Slam tries to resolve but the creature you don't control is still a legal target, each modified creature you control (which may include the target creature you control if it's still on the battlefield) will still deal damage equal to its power to the creature you don't control
and Phoenix Heart, Garfield's wedding to Koni Kim
Blastoise ex SIR [MEW EN 200/165] Japanese Cards: Art Rare (AR) / Super Rare (SR) / Ultra Rare (UR) / Special Art Rare (SAR) Cards featured: Mistys Psyduck AR [SV9a 071/063]
Given how troublesome scalpers can be, however, were not too optimistic about that