pet deck yugioh D/D Dog - Yu-Gi-Oh! Card Database Harpies have always been a

If you look at a typical Infect deck list all of its creatures are Phyrexians thanks to an errata a while ago, so The Seedcore works as a dual land (this is could also help open up the possibility of more three-color infect builds rather than the two-color builds which are most popular today), and almost all the most popular Infect creatures are 1/1s, which makes The Seedcores corrupted pump ability especially impactful

While this card is equipped to a monster: You can Special Summon this card

Theyre a Red and Black 3/3 that costs one of either mana to cast, but only if youve discarded a card that turn

Seeing, or not seeing, a fist, or wing, or tentacle or whatever does the same

Since this card was only given out to a handful of great players, the card has seen a surge in value