---
name: "Grindstone"
mana_cost: "{1}"
cmc: 1
type_line: "Artifact"
colors: []
color_identity: []
keywords: ["Mill"]
set: "TPR"
set_name: "Tempest Remastered"
collector_number: "223"
rarity: "mythic"
artist: "Greg Simanson"
oracle_id: "97560adc-814e-450c-9ca7-f9364e910a0b"
canonical_url: "https://avascry.com/printing/grindstone-tpr"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "not_legal"
  pioneer: "not_legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Grindstone
- **Mana Cost:** `{1}` (CMC: 1)
- **Type:** Artifact
- **Keywords:** Mill

## Oracle Text
{3}, {T}: Target player mills two cards. If two cards that share a color were milled this way, repeat this process.

## Top 4096-Dim Neural Synergies
1. [Millstone](/printing/millstone-m19.md) — Artifact
2. [Whetstone](/printing/whetstone-usg.md) — Artifact
3. [Grinding Station](/printing/grinding-station-5dn.md) — Artifact
4. [Keening Stone](/printing/keening-stone-c16.md) — Artifact
5. [Grindclock](/printing/grindclock-m15.md) — Artifact
6. [Sands of Delirium](/printing/sands-of-delirium-m13.md) — Artifact

## Printing Details
- **Set:** Tempest Remastered (TPR) #223
- **Rarity:** Mythic
- **Artist:** Greg Simanson

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

## Official Rulings
- *(2004-10-04)* If the two cards are both colorless, then the effect does not repeat. It only repeats if both cards have at least one color and at least one color is shared between them.
- *(2024-04-12)* The process can repeat any number of times, as long as two cards that share a color are milled each time.