"Ultra Polymerization"
With it, the player can force the opponent to devolve Evolved Pokmon by returning each of their highest Stage Evolution cards from the bench into the deck, which can result in Knock Outs depending on how many damage counters some creatures already have
Here they are below: Pokmon Ultimate Charizard Collection, PSA 10/9, 1st Edition $18,500 2005 Japanese Umbreon Play Promo Gold Star Holo, P SA 10 Gem Mint $15,000 1st Edition Shadowless Charizard, PSA 9/10 $14,500 1999 Pokmon Game 1st Edition Holographic Charizard [4/102] $14,000 Pokmon Japanese 20th Anniversary 24k Gold Pikachu Promo Card Giza Tanaka $12,500 *(PSA refers to a grading system, with 10 being the best condition possible) eBay also revealed some other tidbits related to the Pokemon franchise on its site
The story of The Brothers War the set looks to touch upon a lot of those characters and events, but will mostly follow Teferi and companys efforts to find a way to deal with the Phyrexians back in their own time likely by trying to find Urza and figure out the Sylex
With lots of options in the card pool to ping bits of damage off your opponent (notably Skeleton Archer), it was a cheap body you could return to your hand over and over again with great consistency