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Prosperous Thief

Creature — Human Ninja

Ninjutsu {1}{U} ({1}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever one or more Ninja or Rogue creatures you control deal combat damage to a player, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

CMC
3
Mana cost
{2}{U}
Color identity
U
Rarity
uncommon
Set
Kamigawa: Neon Dynasty
Price
$0.30
EDHREC rank
#2412
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Prosperous Thief card art
Prosperous Thief generates a Treasure every time a creature you control deals combat damage to a player while unblocked — stack that trigger across a ninjutsu-heavy board and the mana advantage compounds fast. The cost is that it does nothing without a reliable evasion engine, which is exactly why Thousand-Faced Shadow and Splinter, Radical Rat are the cards it wants surrounding it.

Best Commanders

Commanders with the highest synergy

01
Splinter, Radical Rat

Splinter, Radical Rat

82.8% of decks · synergy 0.81

Splinter, Radical Rat is the primary home for Prosperous Thief — Splinter's ninjutsu-matters identity means nearly every combat step is converting unblocked hits into Treasures, turning Prosperous Thief into an engine piece rather than an incidental payoff.

02
Yuriko, the Tiger's Shadow

Yuriko, the Tiger's Shadow

84.3% of decks · synergy 0.73

Yuriko, the Tiger's Shadow decks already flood the board with low-cost ninjas that need to connect to trigger ninjutsu, so Prosperous Thief layers a mana engine on top of the damage-dealing Yuriko already demands.

03
Goro-Goro and Satoru

Goro-Goro and Satoru

65.5% of decks · synergy 0.64

Goro-Goro and Satoru reward you for putting attacking creatures onto the battlefield with haste, and Prosperous Thief converts those hasty unblocked swings into Treasures before opponents can stabilize their defenses.

04
Satoru, the Infiltrator

Satoru, the Infiltrator

47.2% of decks · synergy 0.36

Satoru, the Infiltrator cares about drawing cards when creatures connect, so Prosperous Thief sits alongside him as a complementary payoff that turns the same unblocked attacks into mana instead of just cards.

05
Satoru Umezawa

Satoru Umezawa

41.8% of decks · synergy 0.31

Satoru Umezawa cheats large creatures into play via ninjutsu, and Prosperous Thief picks up Treasure value off the smaller ninjas doing the early-turn connecting that enables those swaps.

Format Analysis

Where it lives, where it can’t

FormatVerdict
commander legal
legacy legal
modern legal
pioneer legal
standard not legal
vintage legal
pauper not legal
oathbreaker legal

Prosperous Thief is a Commander card through and through — the multiplayer table means multiple opponents to connect against, multiplying Treasure output in a way one-on-one formats simply don't support. In Legacy, Modern, and Pioneer it's legal but irrelevant; two-player combat makes the payoff too fragile and too slow against the interaction density those formats demand. Oathbreaker is the one alternative format worth noting: if your planeswalker and signature spell enable consistent unblocked damage, Prosperous Thief can generate real mana, but the 20-life starting total compresses the game before the engine fully fires. Stick to Commander.

Key Combos

Combo lines featuring this card

Price Context

Current price

$0.30 bulk tier

At $0.30, Prosperous Thief is bulk — grab a copy without thinking about it. Bulk rares with a clear home in high-volume commanders like Yuriko, the Tiger's Shadow tend to hold this floor rather than crater further, so there's no urgency either way.

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Sources

Mentioned

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Updated . Data from Scryfall, EDHREC, and Commander Spellbook.