edhseer Commander synergy, explained
Artifact
Mana cost: {4}
As this artifact enters, choose a creature type.
Spells you cast of the chosen type cost {1} less to cast.
static — costs 1 less
When this artifact enters and at the beginning of your upkeep, look at the top card of your library. If it's a card of the chosen type, you may reveal it and put it into your hand. If you don't put the card into your hand, you may put it into your graveyard.
triggered — searches a library
triggered — searches a library
triggered — mills a card
triggered — mills a card
Causes: mill a card.
Cares about: an upkeep, a creature it makes cheaper to cast, an artifact it makes cheaper to cast, an enchantment it makes cheaper to cast, a planeswalker it makes cheaper to cast, an instant it makes cheaper to cast, a sorcery it makes cheaper to cast, a battle it makes cheaper to cast.
a card is milled — 772 cards in the game can cause this (Gathering Stone is one).
an artifact is cast — 3,683 cards in the game can cause this (Gathering Stone is one).
When Gathering Stone is cast:
271 other cards care about it too. These are the ones with the most connections.
a nontoken artifact enters the battlefield — 3,768 cards in the game can cause this (Gathering Stone is one).
When Gathering Stone enters:
an artifact enters the battlefield — 4,643 cards in the game can cause this (Gathering Stone is one).
When Gathering Stone enters:
205 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 (Gathering Stone 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 (Gathering Stone is one).
13 other cards care about it too. These are the ones with the most connections.
a creature it makes cheaper to cast — 19,392 cards in the game can cause this (Gathering Stone is one).
Gathering Stone reduces what:
19,383 other cards care about it too. These are the ones with the most connections.
anything enters the battlefield — 26,499 cards in the game can cause this (Gathering Stone is one).
When Gathering Stone enters:
687 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 (Gathering Stone is one).
14 other cards care about it too. These are the ones with the most connections.