edhseer Commander synergy, explained
Enchantment — Room // Enchantment — Room
Mana cost: {U} // {4}{U}
When you unlock this door, return up to one target creature to its owner's hand.
triggered — bounce
(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
Whenever one or more creatures you control deal combat damage to a player, draw a card.
triggered — draws you 1 card
(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
Causes: a creature leaves the battlefield, draw a card.
Cares about: a creature deals combat damage.
anything is fully unlocked — 1 card in the game can cause this (Bottomless Pool is one).
a Room is fully unlocked — 28 cards in the game can cause this (Bottomless Pool is one).
When Bottomless Pool // Locker Room is fully unlocked:
6 other cards care about it too. These are the ones with the most connections.
an enchantment is cast — 3,673 cards in the game can cause this (Bottomless Pool is one).
When Bottomless Pool // Locker Room is cast:
255 other cards care about it too. These are the ones with the most connections.
a nontoken enchantment enters the battlefield — 3,691 cards in the game can cause this (Bottomless Pool is one).
an enchantment enters the battlefield — 3,743 cards in the game can cause this (Bottomless Pool is one).
When Bottomless Pool // Locker Room enters:
60 other cards care about it too. These are the ones with the most connections.
a card is drawn — 3,815 cards in the game can cause this (Bottomless Pool is one).
When Bottomless Pool // Locker Room makes a player draw a card:
57 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 (Bottomless Pool 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 (Bottomless Pool is one).
When a creature leaves the battlefield thanks to Bottomless Pool // Locker Room:
25 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 (Bottomless Pool is one).
24 other cards care about it too. These are the ones with the most connections.