The Phyrexian deck is very strong and fairly valuable
Looks like a plant for the next block
However, as this theme develops and new proposals emerge, more specific answers will need to be released to establish a limiter that keeps the Metagame in a healthy state
Legendary Creature - Eldrazi Kozilek's Unsealing Devoid (This card has no color.) Whenever you cast a creature spell with mana value 4, 5, or 6, create two 0/1 colorless Eldrazi Spawn creature tokens with "Sacrifice this token: Add ." Whenever you cast a creature spell with mana value 7 or greater, draw three cards
Gonti, Lord of Luxury still seems like the card of choice to play to steal other players stuff
While theres a lot of synergy here, the cards are mostly strong independently, and the deck is designed to play a fair, interactive game that just happens to be able to gain infinite life with Urza and the Thopter Foundry / Sword of the Meek Combo, but mostly Urza, Oko, and Emry are all amazing standalone cards that require fairly different answers