---
name: "Septic Rats"
mana_cost: "{1}{B}{B}"
cmc: 3
type_line: "Creature — Phyrexian Rat"
colors: ["B"]
color_identity: ["B"]
keywords: ["Infect"]
set: "MBS"
set_name: "Mirrodin Besieged"
collector_number: "55"
rarity: "uncommon"
artist: "Cos Koniotis"
oracle_id: "c7335845-ace9-402d-a5be-3bfe3fe9b089"
canonical_url: "https://avascry.com/printing/septic-rats-mbs"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "legal"
  pioneer: "not_legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Septic Rats
- **Mana Cost:** `{1}{B}{B}` (CMC: 3)
- **Type:** Creature — Phyrexian Rat
- **Power/Toughness:** 2/2
- **Keywords:** Infect

## Oracle Text
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Whenever this creature attacks, if defending player is poisoned, it gets +1/+1 until end of turn.

## Top 4096-Dim Neural Synergies
1. [Ichor Rats](/printing/ichor-rats-som.md) — Creature — Phyrexian Rat
2. [Diseased Vermin](/printing/diseased-vermin-all.md) — Creature — Rat
3. [Pestilent Souleater](/printing/pestilent-souleater-nph.md) — Artifact Creature — Phyrexian Insect
4. [Phyrexian Vatmother](/printing/phyrexian-vatmother-plst.md) — Creature — Phyrexian Horror
5. [Chained Throatseeker](/printing/chained-throatseeker-nph.md) — Creature — Phyrexian Horror
6. [Reaper of Sheoldred](/printing/reaper-of-sheoldred-plst.md) — Creature — Phyrexian Horror

## Printing Details
- **Set:** Mirrodin Besieged (MBS) #55
- **Rarity:** Uncommon
- **Artist:** Cos Koniotis
- **Total Printings:** 10 across all historical editions

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