edhseer Commander synergy, explained
Legendary Creature — Sphinx Avatar
Mana cost: {6}{W}{U}{B}
As long as The Ur-Sphinx is in the command zone or on the battlefield, other Sphinx spells you cast cost {1} less to cast.
static — costs 1 less
Flying
Whenever one or more Sphinxes you control attack, each player mills that many cards. For each player, you may cast a card that player milled this way without paying its mana cost.
triggered — mills a card
triggered —
What a deck led by this card wants
Causes: mill a card, cast anything.
Cares about: a Sphinx attacks, a Sphinx creature it makes cheaper to cast, a Sphinx artifact it makes cheaper to cast, a Sphinx enchantment it makes cheaper to cast, a Sphinx planeswalker it makes cheaper to cast, a Sphinx instant it makes cheaper to cast, a Sphinx sorcery it makes cheaper to cast, a Sphinx battle it makes cheaper to cast.
hits creature — 2,283 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.
134 other cards cause it too. These are the ones with the most connections.
a Sphinx enters the battlefield — 149 cards in the game can cause this (The Ur-Sphinx is one).
a card is milled — 785 cards in the game can cause this (The Ur-Sphinx is one).
a card in a graveyard — 7,543 cards in the game can cause this (The Ur-Sphinx is one).
433 other cards care about it too. These are the ones with the most connections.
anything goes to a graveyard — 7,543 cards in the game can cause this (The Ur-Sphinx is one).
When a card hits the graveyard thanks to The Ur-Sphinx:
2 other cards care about it too. These are the ones with the most connections.
anything attacks — 17,785 cards in the game can cause this (The Ur-Sphinx is one).
When The Ur-Sphinx attacks:
118 other cards care about it too. These are the ones with the most connections.
a creature attacks — 17,785 cards in the game can cause this (The Ur-Sphinx is one).
When The Ur-Sphinx attacks:
194 other cards care about it too. These are the ones with the most connections.
a creature enters the battlefield — 19,635 cards in the game can cause this (The Ur-Sphinx is one).
When The Ur-Sphinx enters:
364 other cards care about it too. These are the ones with the most connections.
anything enters the battlefield — 26,290 cards in the game can cause this (The Ur-Sphinx is one).
59 other cards care about it too. These are the ones with the most connections.