edhseer Commander synergy, explained
Sorcery
Mana cost: {3}{G}
Search your library for up to X basic land cards, where X is the number of different powers among creatures you control. Put those cards onto the battlefield tapped, then shuffle.
on-cast — searches a library
on-cast —
on-cast —
Causes: search land , put a land onto the battlefield, shuffle a library.
Cares about: nothing.
a land enters the battlefield — 1,560 cards in the game can cause this (Celebrate the Harvest is one).
When a land enters thanks to Celebrate the Harvest:
199 other cards care about it too. These are the ones with the most connections.
a sorcery is cast — 3,720 cards in the game can cause this (Celebrate the Harvest is one).
When Celebrate the Harvest is cast:
429 other cards care about it too. These are the ones with the most connections.