Shaun, Father of Synths | Godo, Bandit Warlord | Amulet of Vigor (and one other card)

Haste Enabler

Cards

Declare
Godo as an attacker, triggering its second ability and
Shaun's first ability.
Resolve the
Shaun trigger, creating a tapped and attacking copy of
Godo that is a nonlegendary Synth artifact in addition to its other types.
When the
Godo token enters tapped,
Amulet of Vigor and its own first ability trigger.
Resolve the
Amulet of Vigor ability, untapping
Godo.
Resolve the
Godo token ability, allowing you to search your library for an Equipment card and put it onto the battlefield.
Resolve the
Godo trigger from step 1, untapping it and all Samurai you control and causing you to get an additional combat phase after this one.
Repeat each combat phase, each time attacking with a new
Godo that has not attacked yet this turn in step 1.

This combo has been estimated to be Exhibition (Bracket 1+).