edhseer Commander synergy, explained
Instant
Mana cost: {1}{U}
Counter target instant or sorcery spell that targets you.
on-cast —
If there are two or more instant and/or sorcery cards in your graveyard, you may copy the spell countered this way. You may choose new targets for the copy.
on-cast — copies a spell
Causes: counter an instant, counter a sorcery, copy a spell.
Cares about: an instant in a graveyard, a sorcery in a graveyard.
an instant in a graveyard — 2 cards in the game can cause this (Psychic Rebuttal is one).
a sorcery in a graveyard — 2 cards in the game can cause this (Psychic Rebuttal is one).
1 other card cares about it too. These are the ones with the most connections.
a spell is copied — 122 cards in the game can cause this (Psychic Rebuttal is one).
When Psychic Rebuttal is copied:
an instant is cast — 3,931 cards in the game can cause this (Psychic Rebuttal is one).
When Psychic Rebuttal 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 (Psychic Rebuttal is one).
When Psychic Rebuttal is cast:
5 other cards care about it too. These are the ones with the most connections.