Valkyrie's Call + Simulacrum Synthesizer + Atog

Valkyrie's Call

Simulacrum Synthesizer

Atog

How it works

1. Cast the Vehicle by paying its mana cost.
2. When the Vehicle enters the battlefield, Simulacrum Synthesizer triggers, creating a 0/0 Construct artifact creature token that gets +1/+1 for each artifact you control.
3. Activate the Vehicle's crew ability by tapping the Construct, causing the Vehicle to become an artifact creature until end of turn.
4. Activate Atog by sacrificing the Vehicle.
5. When the Vehicle dies, Valkyrie's Call triggers, returning the Vehicle from your graveyard to the battlefield. It will not be an Angel because the Vehicle is no longer a creature and cannot gain creature types.
6. When the Vehicle enters the battlefield, Simulacrum Synthesizer triggers, creating a 0/0 Construct artifact creature token that gets +1/+1 for each artifact you control.
7. Resolve the Atog ability.
8. Repeat from step 3.

This clever loop creates an engine by constantly cycling a Vehicle card in and out of the graveyard to endlessly trigger artifact and creature events. Every time you bring the Vehicle back using Valkyrie's Call, Simulacrum Synthesizer notices the new artifact entering the battlefield and churns out another massive Construct token. Meanwhile, Atog acts as the sacrifice outlet that sends the Vehicle right back to the graveyard to feed the loop, while also growing to an astronomical size from all the snacking.