Breach the Multiverse is a rare Sorcery card from Secret Lair Drop (SLD), collector number 2777. Current market price: $6.75 (foil $6.83), TCGplayer market prices via Scryfall.
Each player mills ten cards. For each player, choose a creature or planeswalker card in that player's graveyard. Put those cards onto the battlefield under your control. Then each creature you control becomes a Phyrexian in addition to its other types.