edhseer Commander synergy, explained
Legendary Creature — Beholder
Mana cost: {4}{U}{B}
At the beginning of your upkeep, choose target opponent. Until end of turn, that player can't cast spells, you may look at the top card of their library any time, you may play the top card of their library, and you may spend mana as though it were mana of any color to cast spells this way.
triggered — taxes the table
What a deck led by this card wants
Causes: nothing.
Cares about: an upkeep.
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.
anything attacks — 17,934 cards in the game can cause this (Xanathar is one).
When Xanathar, Guild Kingpin attacks:
111 other cards care about it too. These are the ones with the most connections.
a creature attacks — 17,934 cards in the game can cause this (Xanathar is one).
When Xanathar, Guild Kingpin attacks:
181 other cards care about it too. These are the ones with the most connections.
a creature blocks — 17,934 cards in the game can cause this (Xanathar is one).
When Xanathar, Guild Kingpin blocks:
18 other cards care about it too. These are the ones with the most connections.
a nontoken creature attacks — 17,934 cards in the game can cause this (Xanathar is one).
When Xanathar, Guild Kingpin attacks:
a creature deals combat damage — 17,934 cards in the game can cause this (Xanathar is one).
When Xanathar, Guild Kingpin deals combat damage:
194 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 (Xanathar is one).
When Xanathar, Guild Kingpin is cast:
86 other cards care about it too. These are the ones with the most connections.
a creature enters the battlefield — 19,800 cards in the game can cause this (Xanathar is one).
When Xanathar, Guild Kingpin enters:
297 other cards care about it too. These are the ones with the most connections.
anything enters the battlefield — 26,499 cards in the game can cause this (Xanathar is one).
39 other cards care about it too. These are the ones with the most connections.