---
name: "Insidious Bookworms"
mana_cost: "{B}"
cmc: 1
type_line: "Creature — Worm"
colors: ["B"]
color_identity: ["B"]
keywords: []
set: "CST"
set_name: "Coldsnap Theme Decks"
collector_number: "51a"
rarity: "common"
artist: "Greg Simanson"
oracle_id: "ff3eeed9-6801-4cab-a97a-72f5f28acb24"
canonical_url: "https://avascry.com/printing/insidious-bookworms-cst"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "not_legal"
  pioneer: "not_legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "legal"
  penny: "not_legal"
---

# Insidious Bookworms
- **Mana Cost:** `{B}` (CMC: 1)
- **Type:** Creature — Worm
- **Power/Toughness:** 1/1

## Oracle Text
When this creature dies, you may pay {1}{B}. If you do, target player discards a card at random.

## Top 4096-Dim Neural Synergies
1. [Rottenheart Ghoul](/printing/rottenheart-ghoul-soi.md) — Creature — Zombie
2. [Drainpipe Vermin](/printing/drainpipe-vermin-rtr.md) — Creature — Rat
3. [Urborg Mindsucker](/printing/urborg-mindsucker-vis.md) — Creature — Horror
4. [Deadbridge Shaman](/printing/deadbridge-shaman-plst.md) — Creature — Elf Shaman
5. [Black Cat](/printing/black-cat-m15.md) — Creature — Zombie Cat
6. [Liliana's Steward](/printing/lilianas-steward-m21.md) — Creature — Zombie

## Printing Details
- **Set:** Coldsnap Theme Decks (CST) #51a
- **Rarity:** Common
- **Artist:** Greg Simanson
- **Total Printings:** 19 across all historical editions

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