edhseer Commander synergy, explained
Sorcery
Mana cost: {2}{U}
Each player chooses a land they control of each basic land type. Return those lands to their owners' hands.
on-cast — bounce
Causes: a land leaves the battlefield.
Cares about: nothing.
a sorcery is cast — 3,720 cards in the game can cause this (Planar Overlay is one).
When Planar Overlay is cast:
424 other cards care about it too. These are the ones with the most connections.
anything is cast — 31,128 cards in the game can cause this (Planar Overlay is one).
When Planar Overlay is cast:
5 other cards care about it too. These are the ones with the most connections.