edhseer Commander synergy, explained
Enchantment — Room // Enchantment — Room
Mana cost: {1}{R} // {3}{U}{U}
When you unlock this door, this Room deals damage equal to the number of cards in your hand to target creature an opponent controls.
triggered — deals damage
(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.)
You have no maximum hand size.
At the beginning of your end step, 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 deals noncombat damage, draw a card.
Cares about: an end step.
anything is fully unlocked — 1 card in the game can cause this (Roaring Furnace is one).
a Room is fully unlocked — 28 cards in the game can cause this (Roaring Furnace is one).
When Roaring Furnace // Steaming Sauna is fully unlocked:
6 other cards care about it too. These are the ones with the most connections.
anything deals noncombat damage — 3,068 cards in the game can cause this (Roaring Furnace is one).
When Roaring Furnace // Steaming Sauna deals noncombat damage:
36 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 (Roaring Furnace is one).
When Roaring Furnace // Steaming Sauna 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 (Roaring Furnace is one).
an enchantment enters the battlefield — 3,743 cards in the game can cause this (Roaring Furnace is one).
When Roaring Furnace // Steaming Sauna 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 (Roaring Furnace is one).
When Roaring Furnace // Steaming Sauna makes a player draw a card:
57 other cards care about it too. These are the ones with the most connections.
a creature is dealt damage — 18,923 cards in the game can cause this (Roaring Furnace is one).
When a creature is dealt damage thanks to Roaring Furnace // Steaming Sauna:
20 other cards care about it too. These are the ones with the most connections.