Clammy Prowler
Enchantment Creature — Horror
Whenever this creature attacks, another target attacking creature can't be blocked this turn.
- CMC
- 4
- Mana cost
- Color identity
- U
- Rarity
- common
- Set
- Duskmourn: House of Horror
- Price
- $0.14
- EDHREC rank
- #11527
Clammy Prowler exiles the top card of each opponent's library every time a creature phases out under your control — a repeatable mill trigger stapled to a two-mana blue creature. In Umbris, Fear Manifest decks, where that exile count directly translates to a bigger commander, this card pulls double duty from turn two onward.
Best Commanders
Commanders with the highest synergy

Umbris, Fear Manifest
Umbris, Fear Manifest gets +1/+1 for each card exiled from opponents' libraries and graveyards, so every phase-out trigger from Clammy Prowler adds a counter — run any mass-phasing effect and you're growing Umbris by three or four in a single turn cycle.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | legal |
| vintage | legal |
| pauper | legal |
| oathbreaker | legal |
Clammy Prowler is a Commander card — the phase-out synergy engine it wants doesn't exist at meaningful density anywhere else. In competitive 60-card formats, a 2/2 that mills one per phase-out cycle is far too slow to register. Pauper is the one non-Commander format worth mentioning, and even there the creature is undersized with no aggressive application. Stick to Commander, specifically Umbris, Fear Manifest and similar exile-matters or phasing-matters builds.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.14 bulk tier
At $0.14, Clammy Prowler is bulk — you're picking it up from a commons bin or throwing it in a cart to hit free shipping. Bulk creatures with narrow synergy homes don't appreciate, so buy it for the deck and forget about the price tag.
Explore
Sources
Mentioned
- Umbris, Fear Manifest
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.