Silent-Blade Oni
Creature — Demon Ninja
Ninjutsu 
(, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever this creature deals combat damage to a player, look at that player's hand. You may cast a spell from among those cards without paying its mana cost.
- CMC
- 7
- Mana cost
- Color identity
- BU
- Rarity
- rare
- Set
- Planechase Anthology
- Price
- $5.31
- EDHREC rank
- #2700
Silent-Blade Oni connects once and you're casting a free spell off the top of an opponent's library — that's immediate, explosive card advantage stapled to a 6/5 body. The seven-mana cost is steep, but Satoru Umezawa lets you ninjutsu it in for two mana, which makes the sticker price largely irrelevant.
Best Commanders
Commanders with the highest synergy
Satoru Umezawa
Satoru Umezawa's ninjutsu-granting ability is exactly why Silent-Blade Oni is in 68% of those decks — you pay two mana, not seven, and immediately cash in on an opponent's top card. The combination of free-spell value and a relevant body makes it one of the premier ninjutsu payoffs in the format.
Splinter, Radical Rat
Splinter, Radical Rat cares about Rogues connecting, and Silent-Blade Oni is a Demon Ninja Rogue that rewards exactly that — landing a hit means you're playing your opponent's deck for a turn. The built-in evasion mechanics of a Splinter shell make connecting reliable enough that the oni's trigger fires consistently.
Kamiz, Obscura Oculus
Kamiz, Obscura Oculus makes one creature unblockable each combat, which turns Silent-Blade Oni's trigger from conditional to near-guaranteed. A guaranteed free cast off an opponent's library is a strong enough upside that nearly half of all Kamiz lists run it.
Yuriko, the Tiger's Shadow
Yuriko, the Tiger's Shadow decks run Silent-Blade Oni primarily as a ninjutsu enabler and high-CMC body — seven mana on the card means a big Yuriko trigger when it comes back to hand and gets ninjutsu'd in again. The free-spell bonus is gravy on top of a card that already slots cleanly into the evasion-and-flip game plan.
Felix Five-Boots
Felix Five-Boots rewards connecting with extra-combat and copy effects, so Silent-Blade Oni's triggered ability can fire multiple times in a single turn cycle. Landing even one free opponent's spell per combat step turns the oni into a value engine that compounds quickly.
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 |
Silent-Blade Oni is a Commander card through and through — the ninjutsu infrastructure that makes it broken simply doesn't exist in Legacy or Vintage at the density needed to abuse it, and seven mana is a non-starter in those formats without that support. In Commander, the card is a genuine role-player: ninjutsu-enabling commanders slash the effective cost to two mana, and triggering the ability even once often generates enough value to swing a game. Oathbreaker is the only other format worth mentioning, where a two-color ninjutsu oathbreaker could set up similar lines, though the smaller starting life totals make the setup trickier. Everywhere else Silent-Blade Oni is either illegal or too slow to matter.
Key Combos
Combo lines featuring this card
Budget Alternatives
Cheaper options that do most of the same work
Fallen Shinobi is the closest analogue — same ninjutsu cost, same "cast off the top" trigger, and it hits two cards instead of one, though you exile rather than cast for free, which matters when opponents have instants worth stealing. If you want something cheaper and more modest, Prosperous Thief or Okiba-Gang Shinobi apply pressure without the spell-theft ceiling that makes Silent-Blade Oni worth the extra mana.
Price Context
Current price
$5.31 mid tier
At $5.31, Silent-Blade Oni sits in the mid tier — expensive enough to feel like a deliberate inclusion but cheap enough that it won't break a focused ninjutsu budget. Given its 68% inclusion rate in Satoru Umezawa decks and strong overlap with several other high-volume commanders, the price reflects genuine demand and is unlikely to soften.
Explore
Sources
Mentioned
- Satoru Umezawa
- Splinter, Radical Rat
- Kamiz, Obscura Oculus
- Yuriko, the Tiger's Shadow
- Felix Five-Boots
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.