edhseer Commander synergy, explained
Land — Town
This land enters tapped.
Add {R} or {W}.
activated {T} — adds 1 mana
Causes: nothing.
Cares about: nothing.
a land enters the battlefield — 1,560 cards in the game can cause this (Rabanastre is one).
When Rabanastre, Royal City enters:
199 other cards care about it too. These are the ones with the most connections.