---
name: "Sentinel"
mana_cost: "{4}"
cmc: 4
type_line: "Artifact Creature — Shapeshifter"
colors: []
color_identity: []
keywords: []
set: "CHR"
set_name: "Chronicles"
collector_number: "107"
rarity: "rare"
artist: "Randy Asplund-Faith"
oracle_id: "c30e8efb-d097-4388-8d5c-1037ccc29fba"
canonical_url: "https://avascry.com/printing/sentinel-chr"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "not_legal"
  pioneer: "not_legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Sentinel
- **Mana Cost:** `{4}` (CMC: 4)
- **Type:** Artifact Creature — Shapeshifter

## Oracle Text
{0}: Change this creature's base toughness to 1 plus the power of target creature blocking or blocked by this creature. (This effect lasts indefinitely.)

## Top 4096-Dim Neural Synergies
1. [Shape Stealer](/printing/shape-stealer-sok.md) — Creature — Shapeshifter Spirit
2. [Shapeshifter](/printing/shapeshifter-me4.md) — Artifact Creature — Shapeshifter
3. [Changeling Sentinel](/printing/changeling-sentinel-mor.md) — Creature — Shapeshifter
4. [Sworn Defender](/printing/sworn-defender-all.md) — Creature — Human Knight
5. [Shield Sphere](/printing/shield-sphere-me1.md) — Artifact Creature — Wall
6. [Changeling Outcast](/printing/changeling-outcast-otc.md) — Creature — Shapeshifter

## Printing Details
- **Set:** Chronicles (CHR) #107
- **Rarity:** Rare
- **Artist:** Randy Asplund-Faith

## 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
- *(2009-10-01)* You apply power/toughness changing effects in a series of sublayers in the following order: (a) effects from characteristic-defining abilities; (b) effects that set power and/or toughness to a specific number or value; (c) effects that modify power and/or toughness but don’t set power and/or toughness to a specific number or value; (d) changes from counters; (e) effects that switch a creature’s power and toughness. This card’s effect is always applied in (b), which means that effects applied in sublayer (c), (d), or (e) will not be overwritten; they will be applied to the new value.