edhseer Commander synergy, explained
Creature — Phyrexian Sphinx
Mana cost: {4}{U}{U}{U}
You may reveal this card from your opening hand. If you do, at the beginning of the first upkeep, each opponent mills seven cards.
static — mills a card
Flying
When this creature enters, you may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost.
triggered — brings a card back
Causes: mill a card, cast an instant, cast a sorcery, an instant leaves a graveyard, a sorcery leaves a graveyard.
Cares about: an instant in a graveyard, a sorcery in a graveyard.
hits creature — 2,298 cards in the game can cause this.
12 other cards care about it too. These are the ones with the most connections.
a Sphinx attacks — 144 cards in the game can cause this (Chancellor of the Spires is one).
a Sphinx enters the battlefield — 149 cards in the game can cause this (Chancellor of the Spires is one).
a Phyrexian attacks — 495 cards in the game can cause this (Chancellor of the Spires is one).
a nontoken Phyrexian enters the battlefield — 496 cards in the game can cause this (Chancellor of the Spires is one).
a Phyrexian enters the battlefield — 524 cards in the game can cause this (Chancellor of the Spires is one).
a card is milled — 772 cards in the game can cause this (Chancellor of the Spires is one).
a sorcery is cast — 3,720 cards in the game can cause this (Chancellor of the Spires is one).
When an instant is cast thanks to Chancellor of the Spires:
424 other cards care about it too. These are the ones with the most connections.
a creature is cast — 18,010 cards in the game can cause this (Chancellor of the Spires is one).
90 other cards care about it too. These are the ones with the most connections.
a nontoken creature enters the battlefield — 18,448 cards in the game can cause this (Chancellor of the Spires is one).
32 other cards care about it too. These are the ones with the most connections.