edhseer Commander synergy, explained
Legendary Creature — Human Rogue
Mana cost: {U}
Flash
Defender, haste
Copy target spell you control that wasn't cast. You may choose new targets for the copy.
activated {1}{U}, {T} — copies a spell
Causes: copy a spell.
Cares about: nothing.
a Rogue creature enters the battlefield — 170 cards in Errant's colors can cause this (Errant is one).
a Human enters the battlefield — 634 cards in Errant's colors can cause this (Errant is one).
a creature attacks — 3,238 cards in Errant's colors can cause this (Errant is one).
When Errant, Street Artist attacks:
44 other cards care about it too. These are the ones with the most connections.
anything attacks — 3,238 cards in Errant's colors can cause this (Errant is one).
When Errant, Street Artist attacks:
2 other cards care about it too. These are the ones with the most connections.
a creature blocks — 3,238 cards in Errant's colors can cause this (Errant is one).
When Errant, Street Artist blocks:
1 other card cares about it too. These are the ones with the most connections.
a creature is cast — 3,254 cards in Errant's colors can cause this (Errant is one).
When Errant, Street Artist is cast:
12 other cards care about it too. These are the ones with the most connections.
a nontoken creature enters the battlefield — 3,316 cards in Errant's colors can cause this (Errant is one).
When Errant, Street Artist enters:
2 other cards care about it too. These are the ones with the most connections.
a creature enters the battlefield — 3,581 cards in Errant's colors can cause this (Errant is one).
When Errant, Street Artist enters:
33 other cards care about it too. These are the ones with the most connections.