edhseer Commander synergy, explained
Instant
Mana cost: {1}{W}
Untap target creature you control. It gets +2/+2 until end of turn. If it's a Dwarf, you may attach an Equipment you control to it.
on-cast — untaps a permanent
on-cast — gives +2/+2
on-cast —
Causes: untap a creature, an Equipment becomes attached.
Cares about: nothing.
a creature untaps — 519 cards in the game can cause this (Vow to Erebor is one).
an instant is cast — 3,931 cards in the game can cause this (Vow to Erebor is one).
When Vow to Erebor is cast:
427 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 (Vow to Erebor is one).
When Vow to Erebor is cast:
5 other cards care about it too. These are the ones with the most connections.