Miasma Demon
Creature — Demon
Flying
When this creature enters, you may discard any number of cards. When you do, up to that many target creatures each get -2/-2 until end of turn.
- CMC
- 6
- Mana cost
- Color identity
- B
- Rarity
- uncommon
- Set
- Duskmourn: House of Horror
- Price
- $0.17
- EDHREC rank
- #19143
Miasma Demon hits the board and immediately forces every player to sacrifice half their hand — a symmetrical effect that punishes card-rich opponents harder than it punishes you. The cost is the 4/3 flying body for five mana, which is below-rate and means you're running this for the discard trigger, not the stats.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Miasma Demon is a Commander card through and through — the forced discard hits all three opponents simultaneously, making the hand-halving asymmetric in your favor by sheer volume. In 1-v-1 formats like Legacy, Modern, or Pioneer, the effect is fully symmetric and a 4/3 flier for five mana is nowhere near competitive; there are faster, cheaper discard engines that don't give the opponent an equal hit. Standard might find fringe use in a dedicated discard shell, but the five-mana ask is steep when the board has no immediate protection. Stick to Commander, and specifically to decks that can empty their own hand before Miasma Demon lands.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.17 bulk tier
At $0.17, Miasma Demon is deep bulk — it costs less than a sleeve. That price is stable simply because demand is low and supply is plentiful, so don't expect movement in either direction.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.