Tony Stark // The Invincible Iron Man voltron

Tony Stark // The Invincible Iron Man is an artifact-centric Voltron commander: on the front side he digs for artifacts (especially Equipment) via his tap ability, while transformed he becomes a flying, hasty threat that, at the beginning of combat, can put an Equipment card from hand onto the battlefield and automatically attach it to himself — a massive discount over normal equip costs.

Game plan: survive the early turns with ramp (Hedron Archive, Solemn Simulacrum, Springleaf Drum, fixing lands like Command Tower, Cascade Bluffs, Mana Confluence), use Tony Stark's activated ability to dig for Equipment, then flip him (4UR) and start stacking free equipment each combat. Swiftfoot Boots and Lightning Greaves protect the commander from removal while he grows; Meteoric Mace, Vibranium Energy Daggers, Starforged Sword and Quick-Draw Katana provide huge stat boosts and attacking keywords (trample, first strike). Hawkeye's Bow and Atomic Microsizer add reach/direct damage and evasion tricks.

Key cards: Bladegraft Aspirant reduces the cost of Equipment spells you cast and of activated abilities targeting him, accelerating the whole plan. Plaza of Heroes protects Tony (hexproof/indestructible) since he's legendary. Prismari Command, Magma Opus and Excavation Explosion give interaction and card advantage to keep the board clear while you gear up.

Win condition: a single lethal swing from a fully-equipped, transformed Tony Stark, usually carrying trample and evasion to get through blockers.

Weaknesses: total dependency on the commander — if he's removed or repeatedly bounced, the plan collapses; very few other creature threats in the deck. Vulnerable to instant-speed removal before Boots/Greaves are attached, and to board wipes that sweep away the Equipment stack along with him.