edhseer Commander synergy, explained
Land
As you create your deck, circle two of the colors below.
This land enters tapped.
Add one mana of either of the circled colors.
activated {T} — adds 1 mana
Causes: nothing.
Cares about: nothing.
a land enters the battlefield — 1,560 cards in the game can cause this (Cryptic Spires is one).
When Cryptic Spires enters:
199 other cards care about it too. These are the ones with the most connections.