edhseer Commander synergy, explained
Land
As this land enters, choose a basic land type. Then you may pay 2 life. If you don't, it enters tapped.
This land is the chosen type.
Causes: nothing.
Cares about: nothing.
a land enters the battlefield — 1,560 cards in the game can cause this (Multiversal Passage is one).
When Multiversal Passage enters:
199 other cards care about it too. These are the ones with the most connections.