edhseer Commander synergy, explained
Sorcery
Mana cost: {4}{W}{W}
Look at the top seven cards of your library. Put up to two planeswalker cards from among them onto the battlefield. Put the rest on the bottom of your library in a random order.
on-cast —
Causes: put a planeswalker onto the battlefield.
Cares about: nothing.
a planeswalker enters the battlefield — 366 cards in the game can cause this (Deploy the Gatewatch is one).
When a planeswalker enters thanks to Deploy the Gatewatch:
2 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 (Deploy the Gatewatch is one).
When Deploy the Gatewatch 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 (Deploy the Gatewatch is one).
When Deploy the Gatewatch is cast:
5 other cards care about it too. These are the ones with the most connections.