Splinter, the Mentor
Legendary Creature — Mutant Ninja Rat
Menace
Whenever Splinter or another nontoken creature you control leaves the battlefield, create a Mutagen token.
Partner—Character select (You can have two commanders if both have this ability.)
- CMC
- 2
- Mana cost
- Color identity
- B
- Rarity
- mythic
- Set
- Teenage Mutant Ninja Turtles Eternal
- Price
- $2.52
- EDHREC rank
- #9868
Splinter, the Mentor puts a tutor-on-a-body directly in the command zone's supporting cast, turning each lesson-learned trigger into card advantage that compounds fast. The cost is real — it demands a specific Teenage Mutant Ninja Turtles shell to fire, and Leonardo, the Balance // Michelangelo, the Heart is the deck where it earns its slot cleanly.
Best Commanders
Commanders with the highest synergy
Leonardo, the Balance // Michelangelo, the Heart
Leonardo, the Balance // Michelangelo, the Heart is the natural home: the commander's own trigger economy feeds directly into Splinter, the Mentor's ability, turning every lesson event into a repeatable tutor chain that can assemble payoffs within a few turns.
Super Shredder
Super Shredder decks reach for Splinter, the Mentor as a value engine that offsets the self-destructive nature of the shell — tutoring up answers or combo pieces each time the lesson clause fires keeps the board state from collapsing under the commander's own pressure.
Splinter, Radical Rat
Splinter, Radical Rat shares a name and a tribe, so Splinter, the Mentor slots in as both a thematic inclusion and a functional tutor that accelerates the rat-centric gameplan by fetching key pieces on curve.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | not legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Commander is where Splinter, the Mentor is built to live — the lesson mechanic and the TMNT synergy package it plugs into are both Commander-native designs, and the card's value scales with how often you can trigger it across a long game. Legacy and Vintage are legal but irrelevant in practice: the card has no meaningful interaction with those formats' threat density, and no competitive shell there wants a 3-mana creature whose payoff requires a specific trigger condition. Oathbreaker is the one fringe case worth noting — if you're piloting a lesson-matters oathbreaker, Splinter, the Mentor offers consistent tutoring that a 60-card singleton format appreciates more than you might expect.
Key Combos
Combo lines featuring this card
Price Context
Current price
$2.52 cheap tier
At $2.52, Splinter, the Mentor sits in the cheap tier — low enough that slotting it into any compatible Commander deck is a no-brainer budget decision. It's a set-specific card with a narrow home, so the price reflects exactly what it is: an efficient include for the decks that want it, with limited demand outside that niche.
Explore
Sources
Mentioned
- Leonardo, the Balance // Michelangelo, the Heart
- Super Shredder
- Splinter, Radical Rat
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.