Alibou, Ancient Witness
The engine that finally gave Boros artifact-aggro a payoff worth attacking with. These decks had always been a pile of small metal bodies looking for a reason to swing, and this Golem answers with two clauses that feed each other: haste turns every artifact creature you cast into an immediate threat, and the attack trigger scales its damage and card selection off the number of tapped artifacts you control. The elegance is that the two halves are the same loop. Haste sends your creatures in, attacking taps them, and that tap count is exactly what powers the trigger, so the reward grows with the swarm it just enabled. Because the damage targets anything, not just blockers, the trigger doubles as removal and reach: it clears a defender before combat math or points straight at a life total the ground cannot touch. The count is tapped artifacts, not just artifact creatures, so mana rocks and any noncreature artifact you tapped for value that turn fold into the same number, which is where the archetype's ceiling really lives. The scry rides along quietly, smoothing draws while the board does the damage. What it built was a specific kind of Boros: not a burn deck, not a tokens deck, but an artifact-count deck where every metal permanent is simultaneously a mana source, an attacker, and a point of damage waiting for the combat step.
