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Isshin, Two Heavens as One

Legendary Creature — Human Samurai

If a creature attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

CMC
3
Mana cost
{R}{W}{B}
Color identity
BRW
Rarity
rare
Set
Secret Lair Drop
Price
$7.07
EDHREC rank
#1431
Buy on TCGplayer
Isshin, Two Heavens as One card art
Isshin, Two Heavens as One doubles every attack trigger on the board — your Hellkite Charger stops costing ten mana to loop, and Caesar, Legion's Emperor mints tokens twice per swing instead of once. Three mana for that kind of structural doubling is an obscene rate.

Best Commanders

Commanders with the highest synergy

01
Caesar, Legion's Emperor

Caesar, Legion's Emperor

66.9% of decks · synergy 0.50

Caesar, Legion's Emperor's attack triggers scale directly with the number of creatures swinging, and Isshin, Two Heavens as One fires each of those triggers twice — token production, card draw, and the Monarch clause all double, turning an already-snowballing engine into something that closes games in two or three combat steps.

02
Altaïr Ibn-La'Ahad

Altaïr Ibn-La'Ahad

62.9% of decks · synergy 0.46

Altaïr Ibn-La'Ahad stacks Investigation and assassination counters off attack triggers, and Isshin, Two Heavens as One means every attacker generates those rewards twice — the Clue engine doubles, the counter payoffs accelerate, and Altaïr's snowball reaches critical mass several turns earlier than it otherwise would.

03
Zurgo, Thunder's Decree

Zurgo, Thunder's Decree

57.9% of decks · synergy 0.41

Zurgo, Thunder's Decree cares about creatures attacking and dealing combat damage, so Isshin, Two Heavens as One firing each of those triggers twice effectively doubles his threat clock and any payoffs stapled to his attack step.

04
Kaalia of the Vast

Kaalia of the Vast

45.6% of decks · synergy 0.29

Kaalia of the Vast herself has an attack trigger that puts an Angel, Demon, or Dragon into play, and while Isshin, Two Heavens as One won't cheat two permanents at once there, the real draw is every Hellkite, Rakdos, and Aurelia already in the Kaalia deck doubling their own on-attack abilities the moment Isshin hits the table.

05
Zurgo Stormrender

Zurgo Stormrender

46.2% of decks · synergy 0.29

Zurgo Stormrender generates token and damage triggers in the attack step, and Isshin, Two Heavens as One doubles the output — more tokens, more triggers resolving, and a faster path to the critical-mass board state Zurgo wants to achieve.

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

Commander is where Isshin, Two Heavens as One lives — the format's multiplayer structure means attack triggers fire constantly, and doubling all of them at three mana is one of the highest-leverage plays available in Mardu. In Legacy, Modern, and Pioneer, Isshin is technically legal but competes in formats where combat-trigger doubling rarely assembles fast enough to matter against linear or interaction-heavy decks; the niche is narrow but real in dedicated go-wide aggressive shells. Vintage gives it the same theoretical home with even fewer takers. Oathbreaker can support it as a companion to an attack-focused planeswalker plan, though the compressed game length makes consistent payoff harder. The honest answer is that every non-Commander application is a corner case — this card was designed for the 100-card format and performs accordingly.

Key Combos

Combo lines featuring this card

122 decks
Isshin, Two Heavens as OneBurakos, Party LeaderAggravated Assault

Isshin, Two Heavens as OneBurakos, Party LeaderAggravated Assault

Infinite colored mana; Infinite combat phases; Infinite lifeloss; Infinite mana creatures you control can produce; Infinite Treasure tokens; Infinite untap of creatures you control

View on Commander Spellbook ↗

Budget Alternatives

Cheaper options that do most of the same work

No card replicates the blanket doubling of Isshin, Two Heavens as One, but Hammers of Moradin and similar "on-attack" utility creatures approximate parts of the engine at a fraction of the cost for specific trigger types. If the goal is doubling enters-the-battlefield effects rather than attack triggers specifically, cards like Panharmonicon overlap enough in creature-heavy builds to serve as a partial substitute — though neither option matches the breadth of what Isshin does for a single three-mana investment.

Price Context

Current price

$7.07 mid tier

At $7.07, Isshin, Two Heavens as One sits in the mid tier — expensive enough to feel like a real purchase, cheap enough that cutting it for budget reasons is hard to justify given how central it is to any deck built around it. Demand from Commander keeps the price stable; this isn't a card that's going to crater.

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Sources

Mentioned

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