Magic: The Gathering Arena: How to Win with Doomsday Excruciator

To win with Doomsday Excruciator in Magic: The Gathering Arena, cast the creature for six black mana during your main phase, preserve your life total, and refrain from drawing extra cards. When Doomsday Excruciator enters the battlefield, both players exile all but the bottom six cards of their libraries face down and begin drawing three cards per turn. Because your opponent takes the first post-cast draw step, turn order forces them to attempt drawing from an empty library on their third turn, triggering an automatic loss under state-based actions.

The Three-Turn Doomsday Clock

Doomsday Excruciator establishes an exact three-turn countdown. Casting it on your turn leaves both players with six cards in library. Since your normal draw step has already resolved, your opponent takes the first turn under the new card-draw rules.

The creature’s static ability makes each player draw two additional cards during their draw step, raising the draw rate to three cards per turn. The resulting library depletion occurs in this exact sequence:

Although your library also reaches zero cards on Turn 2, the game only ends when a player is forced to draw from an empty library. Because your opponent reaches their draw step first on Turn 3, they lose before you ever take another draw step.

Reaching Six Black Mana and Stabilizing

Casting Doomsday Excruciator requires {B}{B}{B}{B}{B}{B}. Because colorless utility lands and tapped dual lands can delay your six-mana requirement, your mana base must focus heavily on basic Swamps and untapped black sources.

To survive against aggressive decks while hitting your land drops:

1. Deploy early spot removal: Use Cut Down on turns one and two against aggressive creatures like Monastery Swiftspear or Heartfire Hero. Follow up with Go for the Throat or Sheoldred's Edict to handle midrange threats.
2. Disrupt early plans: Cast Deep-Cavern Bat on turn two to reveal the opponent's hand and remove their most threatening on-curve play.
3. Control the mid-game board: Use Liliana of the Veil on turn three to force sacrifices and drain hand resources, keeping the battlefield stable before tapping six mana for your demon.

Responding to Opponent Removal and Attacks

Removing Doomsday Excruciator does not restore an opponent's library. The library-exile effect is an enters-the-battlefield trigger that permanently exiles all cards except the bottom six.

If an opponent kills Doomsday Excruciator with targeted removal such as Go for the Throat or Get Lost:

• The static draw effect ceases, reducing their draw rate back to one card per turn.
• The opponent's deck remains locked at whatever cards were left when the demon was removed.
• They gain additional turns before decking out, but their pool of available responses cannot expand past their remaining cards.

Doomsday Excruciator is a 6/6 flying creature. Keep it back as an untapped blocker to stop opposing airborne threats and deter ground assaults unless you have an open attack for lethal damage. Save cheap removal spells like Cut Down or Bitter Triumph to remove opposing haste creatures deployed after your demon resolves.

Accelerating the Clock with Forced Draws and Sheoldred

You can shorten the three-turn clock or bypass it entirely through forced card draw and damage triggers:

• Insatiable Avarice: Cast Insatiable Avarice using its Spree mode ({B}{B}) targeting your opponent. If cast after their first turn when their library has only three cards left, it forces them to draw their remaining library immediately, causing them to lose on their subsequent draw step or to any additional draw effect.
• Sheoldred, the Apocalypse: Sheoldred deals two damage to opponents whenever they draw a card and heals you for two whenever you draw. With Doomsday Excruciator causing three draws per draw step, your opponent takes six direct damage on each of their turns while you gain six life on yours, burning through their life total before the deck-out countdown finishes.

Mistakes That Cause Self-Mill Losses

Once your library drops to six cards, drawing extra cards will deplete your library ahead of schedule and cause you to lose before your opponent.

To avoid accidental self-losses:

• Halt incidental card draw: Do not activate Map tokens, crack Clue tokens, or keep card-draw engines like Phyrexian Arena active after Doomsday Excruciator enters the battlefield.
• Manage attack triggers: Avoid attacking with Preacher of the Schism if your life total is lower than your opponent's, as its ability forces a card draw that can empty your library prematurely.
• Bait counterspells: When facing blue decks, do not tap out six mana into open counterspell mana. Use Deep-Cavern Bat or Liliana of the Veil to draw out counters like Three Steps Ahead or Make Disappear before casting Doomsday Excruciator.