edhseer Commander synergy, explained
Land
This land enters tapped.
Add {R} or {W}.
activated {T} — adds 1 mana
Until end of turn, this land becomes a 2/1 red and white Elemental creature with double strike. It's still a land.
activated {2}{R}{W} — turns something into a creature
Causes: nothing.
Cares about: nothing.
a land enters the battlefield — 1,560 cards in the game can cause this (Needle Spires is one).
When Needle Spires enters:
199 other cards care about it too. These are the ones with the most connections.