Valkyrie's Call + Simulacrum Synthesizer + Lithatog

Valkyrie's Call

Simulacrum Synthesizer

Lithatog

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 Lithatog 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 Lithatog ability.
8. Repeat from step 3.

This elegant loop relies on repeatedly cycling a Vehicle through the graveyard to flood the board with triggers and massive stats. Every time the Vehicle re-enters the battlefield, Simulacrum Synthesizer notices the large artifact arriving and rewards you with a growing Construct token. Lithatog acts as your reliable sacrifice outlet to send the Vehicle straight to the graveyard, while Valkyrie's Call instantly plucks it back out to the battlefield to restart the cycle.