edhseer Commander synergy, explained
Land — Desert
This land enters tapped.
Add one mana of any type that a land you control could produce.
activated {T} — adds 1 mana
Until end of turn, this land becomes an X/X green Plant creature with reach, where X is the greatest mana value among your commanders. It's still a land.
activated {3} — turns something into a creature
Causes: nothing.
Cares about: nothing.
a Desert enters the battlefield — 40 cards in the game can cause this (Cactus Preserve is one).
a land enters the battlefield — 1,560 cards in the game can cause this (Cactus Preserve is one).
When Cactus Preserve enters:
199 other cards care about it too. These are the ones with the most connections.