edhseer Commander synergy, explained
Instant
Mana cost: {3}{U}{U}{U}
If a creature would enter the battlefield under an opponent's control this turn, it enters under your control instead.
on-cast —
Causes: take control of a creature.
Cares about: nothing.
an instant is cast — 3,931 cards in the game can cause this (Gather Specimens is one).
When Gather Specimens is cast:
427 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 (Gather Specimens is one).
When Gather Specimens is cast:
5 other cards care about it too. These are the ones with the most connections.