edhseer Commander synergy, explained
Land — Sphere
Add {C}.
activated {T} — adds 1 mana
Add one mana of any color. Spend this mana only to cast Phyrexian creature spells.
activated {T} — adds 1 mana
Target 1/1 creature gets +2/+1 until end of turn. Activate only if an opponent has three or more poison counters.
activated {T} — gives +2/+1
Causes: nothing.
Cares about: nothing.
a land enters the battlefield — 1,560 cards in the game can cause this (The Seedcore is one).
When The Seedcore enters:
199 other cards care about it too. These are the ones with the most connections.