edhseer Commander synergy, explained
Legendary Creature — Human Knight
Mana cost: {1}{W}
Choose another target creature. Its controller may exile it with an aegis counter on it.
activated {1}{W} —
Return all exiled cards with aegis counters on them to the battlefield under their owners' control.
activated {2}{W}, {T} — blinks a permanent
Partner
Causes: exile a creature, a creature leaves the battlefield, put anything onto the battlefield.
Cares about: nothing.
a Knight enters the battlefield — 252 cards in Livio's colors can cause this (Livio is one).
a creature leaves the battlefield — 901 cards in Livio's colors can cause this (Livio is one).
10 other cards care about it too. These are the ones with the most connections.
a Human enters the battlefield — 1,260 cards in Livio's colors can cause this (Livio is one).
When Livio, Oathsworn Sentinel enters:
a creature attacks — 3,562 cards in Livio's colors can cause this (Livio is one).
When Livio, Oathsworn Sentinel attacks:
58 other cards care about it too. These are the ones with the most connections.
anything attacks — 3,562 cards in Livio's colors can cause this (Livio is one).
When Livio, Oathsworn Sentinel attacks:
21 other cards care about it too. These are the ones with the most connections.
a creature blocks — 3,562 cards in Livio's colors can cause this (Livio is one).
When Livio, Oathsworn Sentinel blocks:
3 other cards care about it too. These are the ones with the most connections.
a nontoken creature attacks — 3,562 cards in Livio's colors can cause this (Livio is one).
When Livio, Oathsworn Sentinel attacks:
a creature deals combat damage — 3,562 cards in Livio's colors can cause this (Livio is one).
49 other cards care about it too. These are the ones with the most connections.
a creature is cast — 3,572 cards in Livio's colors can cause this (Livio is one).
When Livio, Oathsworn Sentinel is cast:
9 other cards care about it too. These are the ones with the most connections.
a nontoken creature enters the battlefield — 3,697 cards in Livio's colors can cause this (Livio is one).
When Livio, Oathsworn Sentinel enters:
1 other card cares about it too. These are the ones with the most connections.
a creature enters the battlefield — 4,091 cards in Livio's colors can cause this (Livio is one).
When Livio, Oathsworn Sentinel enters:
80 other cards care about it too. These are the ones with the most connections.
anything enters the battlefield — 6,738 cards in Livio's colors can cause this (Livio is one).
6 other cards care about it too. These are the ones with the most connections.