edhseer Commander synergy, explained
Land
As this land enters, you may reveal an Elemental card from your hand. If you don't, this land enters tapped.
Add {C}.
activated {T} — adds 1 mana
Add one mana of any color. Spend this mana only to cast an Elemental spell or activate an ability of an Elemental.
activated {T} — adds 1 mana
Causes: nothing.
Cares about: nothing.
a land enters the battlefield — 1,560 cards in the game can cause this (Primal Beyond is one).
When Primal Beyond enters:
199 other cards care about it too. These are the ones with the most connections.