Stronghold Furnace

At the beginning of your end step, if you have no cards in hand, draw seven cards. Whenever chaos ensues, discard your hand.

When you planeswalk to The Aether Flues and at the beginning of your upkeep, you may sacrifice a creature. If you do, reveal cards from the top of your library until you reveal a creature card, put that card onto the battlefield, then shuffle all other cards revealed this way into your library. Whenever chaos ensues, you may put a creature card from your hand onto the battlefield.

Whenever a white creature dies, return it to the battlefield under its owner's control at the beginning of the next end step. Whenever a nonwhite creature dies, return it to its owner's hand at the beginning of the next end step. Whenever chaos ensues, creatures can't attack you until a player planeswalks.

All creatures have exalted. (Whenever a creature attacks alone, it gets +1/+1 until end of turn for each instance of exalted among permanents its controller controls.) Whenever chaos ensues, put a divinity counter on target green, white, or blue creature. That creature has indestructible for as long as it has a divinity counter on it.

When you planeswalk to Cliffside Market and at the beginning of your upkeep, you may exchange life totals with target player. Whenever chaos ensues, exchange control of two target permanents that share a card type.

Whenever a nonblack card is put into a player's graveyard from anywhere, that player loses 1 life. Whenever chaos ensues, each opponent discards a card.

Whenever a player taps a permanent for mana, that player adds one mana of any type that permanent produced. Whenever chaos ensues, target player can't cast spells until a player planeswalks.

Players skip their untap steps. Whenever chaos ensues, untap all permanents you control.