edhseer Commander synergy, explained
Instant
Mana cost: {1}{U}
Return target nonland permanent to its owner's hand. If that permanent had mana value 3 or less, proliferate.
on-cast — bounce
on-cast — proliferates
Causes: an artifact leaves the battlefield, a battle leaves the battlefield, a creature leaves the battlefield, an enchantment leaves the battlefield, a planeswalker leaves the battlefield, proliferate permanent .
Cares about: nothing.
you proliferate — 90 cards in the game can cause this (Serum Snare is one).
When a permanent proliferates thanks to Serum Snare:
1 other card cares about it too. These are the ones with the most connections.
an instant is cast — 3,931 cards in the game can cause this (Serum Snare is one).
When Serum Snare is cast:
427 other cards care about it too. These are the ones with the most connections.
a nontoken creature leaves the battlefield — 4,133 cards in the game can cause this (Serum Snare is one).
3 other cards care about it too. These are the ones with the most connections.
a creature leaves the battlefield — 4,238 cards in the game can cause this (Serum Snare is one).
When a creature leaves the battlefield thanks to Serum Snare:
25 other cards care about it too. These are the ones with the most connections.
anything gets a counter — 4,415 cards in the game can cause this (Serum Snare is one).
When a permanent gets a counter thanks to Serum Snare:
4 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 (Serum Snare is one).
When Serum Snare is cast:
5 other cards care about it too. These are the ones with the most connections.