edhseer Commander synergy, explained
Land
Add {C}.
activated {T} — adds 1 mana
This land becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
activated {1} — turns something into a creature
Target Assembly-Worker creature gets +1/+1 until end of turn.
activated {T} — gives +1/+1
Causes: nothing.
Cares about: nothing.
a land enters the battlefield — 1,560 cards in the game can cause this (Mishra's Factory is one).
When Mishra's Factory enters:
199 other cards care about it too. These are the ones with the most connections.