Legendary Creature — Dragon Spirit

Keiga, the Tide Star

Mana value6EDHREC#4,259

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The Commander

Flying

When Keiga dies, gain control of target creature.

Guide

Gameplan

Keiga is a mono-blue value engine and threat: a 5/5 flier that steals a creature whenever it dies. You play a controlling game, leveraging blue's card draw, counters, and interaction while repeatedly sacrificing, blinking, or trading Keiga to grab opponents' best creatures. Win slowly through air superiority and accumulated card/board advantage.

Strengths

Built-in removal and theft on death makes Keiga a no-downside threat that opponents hate to remove
Mono-blue gives access to the deepest counterspell and card-advantage suite in the format
Flying 5/5 body pressures life totals while also blocking other fliers
Synergizes beautifully with sacrifice outlets and blink effects to abuse its death trigger repeatedly

Weaknesses

Mono-blue struggles with broad board wipes, enchantments, and artifacts outside of bounce
Keiga's trigger only steals one creature and does nothing against creatureless or token-light decks
Six mana for a creature that wants to die can feel clunky without an enabler online
Slow clock relative to dedicated combo or aggro decks at higher power levels

Key Cards

Ashnod's Altar — Free sacrifice outlet that triggers Keiga's steal on demand while ramping into more spells.
Deadeye Navigator — Soulbond blink lets you flicker Keiga, but more importantly recurs the death-or-ETB value engine reliably.
Cyclonic Rift — The premier mono-blue board-asymmetry button that protects Keiga's air assault and seals games.
Rite of Replication — Kicked, it makes five Keigas, each stealing a creature when they die for an overwhelming swing.
Aetherflux Reservoir — A consistent mono-blue alternate win route if the game grinds long.

Upgrade Path

Add efficient sacrifice and blink enablers (Ashnod's Altar, Deadeye Navigator, Phyrexian Altar) so Keiga's death trigger fires reliably, then tighten the mana base with fast rocks (Sol Ring, Mana Crypt) and premium counterspells. Lean into copy effects like Rite of Replication and Spark Double to multiply the steal, and round out with a compact win like Thassa's Oracle plus Demonic Consultation or a mill/Aetherflux package to avoid grinding forever.

Core Cards

The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.

Win Conditions

▸Beat down with a 5/5 flier plus stolen creatures
▸Combat damage backed by Cyclonic Rift tempo blowout
▸Aetherflux Reservoir or other mono-blue alt-win after grinding card advantage
▸Mass-copying Keiga to steal an entire opposing board

Archetypes

Control — Mono-blue counters and card draw let Keiga sit atop a defensive shell as inevitability.
Aristocrats — Sacrifice outlets convert Keiga's death trigger into repeatable creature theft.
Blink — Flicker effects reset and abuse Keiga as a recurring engine and protect it from removal.
Voltron — A flying body can be suited up with auras and equipment to close fast in the air.

Combos

Keiga, the Tide Star + Nim Deathmantle + Ashnod's Altar
→ Gain control of all creatures opponents control and sacrifice them, Gain control of any creatures that enters the battlefield, Lock
Keiga, the Tide Star + Nim Deathmantle + Pitiless Plunderer + Phyrexian Altar
→ Gain control of all creatures opponents control and sacrifice them, Gain control of any creatures that enters the battlefield, Lock
Keiga, the Tide Star + Nim Deathmantle + Pitiless Plunderer + Thermopod
→ Gain control of all creatures opponents control and sacrifice them, Gain control of any creatures that enters the battlefield, Lock

Combos via Commander Spellbook.