Alchemy: Phyrexia

Menace Whenever Sheoldred's Assimilator enters or attacks, exile up to one target card from a graveyard. If a card is exiled this way, you may conjure a duplicate of that card into the top five cards of your library at random.

Flying Toxic 1 Whenever Skullpiercer Gnat deals combat damage to a player, a random nonland card in that player's hand perpetually gains "When you cast this spell, you get a poison counter."

1, T, Sacrifice a creature: Seek a creature card with mana value equal to 1 plus the sacrificed creature's mana value and put that card onto the battlefield. That creature is a Phyrexian in addition to its other types. Activate only as a sorcery.

This spell costs 1 less to cast if you weren't the starting player. You may have Surgical Metamorph enter as a copy of any permanent on the battlefield, except it's an artifact in addition to its other types.

Exile three random cards from your library face down and look at them. For as long as they remain exiled, you may play one of those cards.

Whenever you seek one or more cards, create a 3/3 colorless Phyrexian Golem artifact creature token. Golems you control have vigilance.