Obsidian Charmaw
Creature — Dragon
This spell costs 
less to cast for each land your opponents control that could produce 
.
Flying
When this creature enters, destroy target nonbasic land an opponent controls.
- CMC
- 5
- Mana cost
- Color identity
- R
- Rarity
- rare
- Set
- Modern Horizons 2
- Price
- $1.90
- EDHREC rank
- #10271
Obsidian Charmaw enters as a 4/4 that destroys a nonbasic land — immediate board impact before it ever attacks. The cost scales down for each Dragon you control, making it trivially cheap in any dedicated Dragon shell, and Dragonhawk, Fate's Tempest in particular turns it into a repeatable threat with near-zero overhead.
Best Commanders
Commanders with the highest synergy
Dragonhawk, Fate's Tempest
Dragonhawk, Fate's Tempest rewards you for casting Dragons repeatedly, and Obsidian Charmaw's cost reduction means it often hits the table for two or three mana — enough to keep the wheel engine churning while stripping an opponent's key nonbasic every time it loops back.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Commander is where Obsidian Charmaw belongs — nonbasic lands are everywhere, the Dragon synergy density is high enough to reliably reduce its cost, and blowing up a Cabal Coffers or Urza's Saga on entry is genuinely impactful. In Legacy and Vintage, the competition is too stiff: dedicated land-destruction strategies have faster, cheaper tools, and a 4/4 Dragon at five-plus mana doesn't threaten the format's dominant game plans. Modern is legal but similarly uninviting — the card does nothing until it resolves, and Dragon tribal isn't a viable Modern archetype. Treat Obsidian Charmaw as a Commander-first card; every other format is an afterthought.
Key Combos
Combo lines featuring this card
Price Context
Current price
$1.90 cheap tier
At $1.90, Obsidian Charmaw sits in the guilt-free pickup tier — cheap enough to throw into any Dragon build without deliberation. It's a niche roleplayer rather than a staple, so don't expect the price to move much, but you're getting real value for the cost.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.