edhseer Commander synergy, explained
Sorcery
Mana cost: {X}{B}{B}
Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.
on-cast — puts X counters on it
on-cast —
Causes: put a counter on a creature, shuffle a library.
Cares about: nothing.
a library is shuffled — 1,189 cards in the game can cause this (Black Sun's Zenith is one).
When Black Sun's Zenith shuffles a library:
a creature gets a counter — 2,691 cards in the game can cause this (Black Sun's Zenith is one).
When a creature gets a counter thanks to Black Sun's Zenith:
31 other cards care about it too. These are the ones with the most connections.
a sorcery is cast — 3,720 cards in the game can cause this (Black Sun's Zenith is one).
When Black Sun's Zenith is cast:
424 other cards care about it too. These are the ones with the most connections.
anything gets a counter — 4,415 cards in the game can cause this (Black Sun's Zenith is one).
7 other cards care about it too. These are the ones with the most connections.
anything is cast — 31,128 cards in the game can cause this (Black Sun's Zenith is one).
When Black Sun's Zenith is cast:
5 other cards care about it too. These are the ones with the most connections.