When Dromar's Cavern enters the battlefield, sacrifice it unless you return a non-Lair land you control to its owner's hand. {T}: Add {W}, {U}, or {B}.
Dungeon Descent enters the battlefield tapped. {T}: Add {C}. {4}, {T}, Tap an untapped legendary creature you control: Venture into the dungeon. Activate only as a sorcery.
Yawning Portal — You gain 1 life. (Leads to: Dungeon Level) Dungeon Level — Scry 1. (Leads to: Goblin Bazaar, Twisted Caverns) Goblin Bazaar — Create a Treasure token. (Leads to: Lost Level) Twisted Caverns — Target creature can't attack until your next turn. (Leads to: Lost Level) Lost Level — Scry 2. (Leads to: Runestone Caverns, Muiral's Graveyard) Runestone Caverns — Exile the top two cards of your library. You may play them. (Leads to: Deep Mines) Muiral's Graveyard — Create two 1/1 black Skeleton creature tokens. (Leads to: Deep Mines) Deep Mines — Scry 3. (Leads to: Mad Wizard's Lair) Mad Wizard's Lair — Draw three cards and reveal them. You may cast one of them without paying its mana cost.
Whenever you crank Duplication Device, until end of turn, target creature becomes a copy of any creature on the battlefield, except it's an artifact in addition to its other types.
Dwarven Hold enters the battlefield tapped. You may choose not to untap Dwarven Hold during your untap step. At the beginning of your upkeep, if Dwarven Hold is tapped, put a storage counter on it. {T}, Remove any number of storage counters from Dwarven Hold: Add {R} for each storage counter removed this way.
Dwarven Mine enters the battlefield tapped unless you control three or more other Mountains. When Dwarven Mine enters the battlefield untapped, create a 1/1 red Dwarf creature token.
Flying, haste When Echo of Death's Wail enters the battlefield, gain control of all Rat tokens. Whenever Echo of Death's Wail attacks, you may sacrifice another creature. If you do, draw a card.
Hidden agenda Whenever you cast an instant or sorcery spell, if it targets a creature you control with the chosen name, you may copy that spell and may choose new targets for the copy.
You may have Echoing Deeps enter the battlefield tapped as a copy of any land card in a graveyard, except it's a Cave in addition to its other types. {T}: Add {C}.
The still, silent waters reflect what was, not what is.
(Color indicator: Edgar Markov's Coffin is white and black)
At the beginning of your upkeep, create a 1/1 white and black Vampire creature token with lifelink and put a bloodline counter on Edgar Markov's Coffin. Then if there are three or more bloodline counters on it, remove those counters and transform it.
If a creature you control would untap during your untap step, put two +1/+1 counters on it instead. Whenever chaos ensues, untap each creature you control.