edhseer Commander synergy, explained
Legendary Enchantment Creature — Horror
Mana cost: {4}{B}{B}{B}
Arvinox isn't a creature unless you control three or more permanents you don't own.
static —
At the beginning of your end step, exile the bottom card of each opponent's library face down. For as long as those cards remain exiled, you may look at them, you may cast permanent spells from among them, and you may spend mana as though it were mana of any color to cast those spells.
triggered —
triggered —
Causes: exile a card, cast an artifact, cast a battle, cast a creature, cast an enchantment, cast a planeswalker.
Cares about: an end step.
a battle is cast — 15 cards in Arvinox's colors can cause this (Arvinox is one).
When Arvinox, the Mind Flail is cast:
2 other cards care about it too. These are the ones with the most connections.
a planeswalker is cast — 45 cards in Arvinox's colors can cause this (Arvinox is one).
12 other cards care about it too. These are the ones with the most connections.
an enchantment is cast — 594 cards in Arvinox's colors can cause this (Arvinox is one).
12 other cards care about it too. These are the ones with the most connections.
an artifact is cast — 2,470 cards in Arvinox's colors can cause this (Arvinox is one).
11 other cards care about it too. These are the ones with the most connections.
an enchantment enters the battlefield — 597 cards in Arvinox's colors can cause this (Arvinox is one).
When Arvinox, the Mind Flail enters:
1 other card cares about it too. These are the ones with the most connections.
a creature is cast — 3,493 cards in Arvinox's colors can cause this (Arvinox is one).
When Arvinox, the Mind Flail is cast:
8 other cards care about it too. These are the ones with the most connections.