---
name: "Unholy Grotto"
mana_cost: "N/A"
cmc: 0
type_line: "Land"
colors: []
color_identity: ["B"]
keywords: []
set: "ONS"
set_name: "Onslaught"
collector_number: "327"
rarity: "rare"
artist: "John Avon"
oracle_id: "c28211c6-a5ee-40c3-bb6a-da3e7e73fd95"
canonical_url: "https://avascry.com/printing/unholy-grotto-ons"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "not_legal"
  pioneer: "not_legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Unholy Grotto
- **Mana Cost:** `N/A` (CMC: 0)
- **Type:** Land

## Oracle Text
{T}: Add {C}.
{B}, {T}: Put target Zombie card from your graveyard on top of your library.

## Top 4096-Dim Neural Synergies
1. [Mortuary Mire](/printing/mortuary-mire-clb.md) — Land
2. [Volrath's Stronghold](/printing/volraths-stronghold-sth.md) — Legendary Land
3. [Cemetery Recruitment](/printing/cemetery-recruitment-fdn.md) — Sorcery
4. [Haunted Crossroads](/printing/haunted-crossroads-mmq.md) — Enchantment
5. [Ghoulcaller's Chant](/printing/ghoulcallers-chant-isd.md) — Sorcery
6. [Gravebane Zombie](/printing/gravebane-zombie-mir.md) — Creature — Zombie

## Printing Details
- **Set:** Onslaught (ONS) #327
- **Rarity:** Rare
- **Artist:** John Avon
- **Total Printings:** 16 across all historical editions

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