edhseer Commander synergy, explained
Legendary Creature — Human
Mana cost: {3}{R}
Whenever you cast an instant or sorcery spell that targets only Bill Potts or activate an ability that targets only Bill Potts, copy that spell or ability. You may choose new targets for the copy. This ability triggers only once each turn.
triggered — copies an ability
Doctor's companion
Causes: copy a spell.
Cares about: an instant is cast, a sorcery is cast, an activated ability to copy, a triggered ability to copy.
a spell is copied — 43 cards in Bill Potts's colors can cause this (Bill Potts is one).
cast a sorcery — 811 cards in Bill Potts's colors can cause this.
810 other cards cause it too. These are the ones with the most connections.
cast an instant — 722 cards in Bill Potts's colors can cause this.
712 other cards cause it too. These are the ones with the most connections.
a Human enters the battlefield — 661 cards in Bill Potts's colors can cause this (Bill Potts is one).
When Bill Potts enters:
a creature attacks — 3,451 cards in Bill Potts's colors can cause this (Bill Potts is one).
When Bill Potts attacks:
58 other cards care about it too. These are the ones with the most connections.
a creature blocks — 3,451 cards in Bill Potts's colors can cause this (Bill Potts is one).
When Bill Potts blocks:
1 other card cares about it too. These are the ones with the most connections.
anything attacks — 3,451 cards in Bill Potts's colors can cause this (Bill Potts is one).
When Bill Potts attacks:
19 other cards care about it too. These are the ones with the most connections.
a creature is cast — 3,468 cards in Bill Potts's colors can cause this (Bill Potts is one).
When Bill Potts is cast:
10 other cards care about it too. These are the ones with the most connections.
a nontoken creature enters the battlefield — 3,511 cards in Bill Potts's colors can cause this (Bill Potts is one).
When Bill Potts enters:
a creature it boosts — 3,758 cards in Bill Potts's colors can cause this.
3,748 other cards cause it too. These are the ones with the most connections.
a creature it grants abilities to — 3,758 cards in Bill Potts's colors can cause this.
3,748 other cards cause it too. These are the ones with the most connections.
a creature it applies speed increase to — 3,758 cards in Bill Potts's colors can cause this.
3,748 other cards cause it too. These are the ones with the most connections.
a creature it applies extra combat to — 3,758 cards in Bill Potts's colors can cause this.
3,757 other cards cause it too. These are the ones with the most connections.
a creature it grants types to — 3,758 cards in Bill Potts's colors can cause this.
3,756 other cards cause it too. These are the ones with the most connections.
a creature it makes cheaper to cast — 3,758 cards in Bill Potts's colors can cause this.
3,755 other cards cause it too. These are the ones with the most connections.
a creature enters the battlefield — 3,801 cards in Bill Potts's colors can cause this (Bill Potts is one).
When Bill Potts enters:
58 other cards care about it too. These are the ones with the most connections.