edhseer Commander synergy, explained
Sorcery
Mana cost: {2}{B}
Target opponent reveals their hand. You may choose a nonland card from it. If you do, that player discards that card. If you don't, put two +1/+1 counters on a creature or Vehicle you control.
on-cast —
on-cast — puts 2 counters on it
Causes: discard an artifact, discard a battle, discard a creature, discard an enchantment, discard an instant, discard a planeswalker, discard a sorcery, put a counter on anything.
Cares about: nothing.
a battle is discarded — 15 cards in the game can cause this (Reckoner Shakedown is one).
6 other cards care about it too. These are the ones with the most connections.
a card is discarded — 2,042 cards in the game can cause this (Reckoner Shakedown is one).
When a creature, artifact, enchantment, instant, sorcery, planeswalker or battle makes a player discard a card thanks to Reckoner Shakedown:
51 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 (Reckoner Shakedown is one).
When Reckoner Shakedown is cast:
424 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 (Reckoner Shakedown is one).
7 other cards care about it too. These are the ones with the most connections.
a card in a graveyard — 7,589 cards in the game can cause this (Reckoner Shakedown is one).
434 other cards care about it too. These are the ones with the most connections.
anything goes to a graveyard — 7,589 cards in the game can cause this (Reckoner Shakedown is one).
When a card hits the graveyard thanks to Reckoner Shakedown:
5 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 (Reckoner Shakedown is one).
When Reckoner Shakedown is cast:
5 other cards care about it too. These are the ones with the most connections.