---
name: "Swimmer in Nightmares"
mana_cost: "{2}{U}"
cmc: 3
type_line: "Creature — Nightmare Merfolk"
colors: ["U"]
color_identity: ["U"]
keywords: []
set: "THB"
set_name: "Theros Beyond Death"
collector_number: "275"
rarity: "uncommon"
artist: "Lucas Graciano"
oracle_id: "64ca54ee-1502-4fae-b919-7e4457e641c0"
canonical_url: "https://avascry.com/printing/swimmer-in-nightmares-thb"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "legal"
  pioneer: "legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Swimmer in Nightmares
- **Mana Cost:** `{2}{U}` (CMC: 3)
- **Type:** Creature — Nightmare Merfolk
- **Power/Toughness:** 1/4

## Oracle Text
This creature gets +3/+0 as long as there are ten or more cards in a single graveyard.
This creature can't be blocked as long as you control an Ashiok planeswalker.

> *安梭苛的手下既能畅游深洋，也能究索心灵。*

## Top 4096-Dim Neural Synergies
1. [Ashiok's Skulker](/printing/ashioks-skulker-war.md) — Creature — Nightmare
2. [Nightmare](/printing/nightmare-w17.md) — Creature — Nightmare Horse
3. [Gray Harbor Merfolk](/printing/gray-harbor-merfolk-clb.md) — Creature — Merfolk Rogue
4. [Drownyard Amalgam](/printing/drownyard-amalgam-dbl.md) — Creature — Zombie Horror
5. [Blockade Runner](/printing/blockade-runner-mmq.md) — Creature — Merfolk
6. [Expedition Lookout](/printing/expedition-lookout-mom.md) — Creature — Merfolk Rogue

## Printing Details
- **Set:** Theros Beyond Death (THB) #275
- **Rarity:** Uncommon
- **Artist:** Lucas Graciano
- **Total Printings:** 11 across all historical editions

## Format Legalities
Commander: `legal` | Standard: `not_legal` | Modern: `legal` | Pioneer: `legal` | Legacy: `legal` | Vintage: `legal` | Pauper: `not_legal` | Penny: `not_legal`