edhseer Commander synergy, explained
Land — Desert
This land enters tapped. As it enters, choose a color.
Add one mana of the chosen color.
activated {T} — adds 1 mana
Causes: nothing.
Cares about: nothing.
a Desert enters the battlefield — 40 cards in the game can cause this (Mirage Mesa is one).
a land enters the battlefield — 1,560 cards in the game can cause this (Mirage Mesa is one).
When Mirage Mesa enters:
199 other cards care about it too. These are the ones with the most connections.