Whenever you cast an Artificer or artifact spell, you get (an energy counter).
At the beginning of combat on your turn, you may pay . When you do, create a token that's a copy of target permanent you control, except it's a 5/5 artifact creature in addition to its other types and has haste. Sacrifice it at the beginning of the next end step.
Saheeli is a Temur artifact-energy engine: cast cheap artifacts and Artificers to bank energy, then each combat spend three energy to make a hasty 5/5 copy of your best permanent. Early turns ramp into artifacts to flood energy; midgame you copy mana rocks, value creatures, or bombs for ETB and attack value; the late game converts energy-fueled copies into lethal swings or combo payoffs before sacrificing them at end step.
Generates a free, repeatable token copy every combat with no mana cost beyond energy
Copies as a 5/5 with haste, so even small permanents become real threats and attackers
Easily floods energy with cheap artifacts, then converts that into value or ETB chains
Temur gives access to ramp, card draw, and the deepest artifact pool
Token is sacrificed each end step, so persistent advantage requires ETB/attack triggers, not bodies
Energy banking is slow if you stumble on artifact density
Heavily reliant on the commander; lots of effort recasting through removal
Vulnerable to graveyard/exile hate and stax that punishes the cast-trigger engine
A copy target whose ETB ramps and dies-draw both trigger when the 5/5 copy is sacrificed.
Tighten the artifact count so energy comes online by turn three or four, and add fast mana like Mana Crypt, Sol Ring, and Mox Opal alongside more energy payoffs such as Aetherworks Marvel. Pivot toward explosive copy targets (Dockside Extortionist, Wurmcoil Engine, value ETB creatures) and add tutors plus a tight combo line so the copies generate immediate, game-ending mana or value rather than just bodies. Improve the mana base with shocks, fetches, and Temur fixing to support the three-color demands.
Legendary Creature — Human Artificer
(an energy counter).