Valkyrie's Call + Simulacrum Synthesizer + Megatog

Valkyrie's Call

Simulacrum Synthesizer

Megatog

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 Megatog 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 Megatog ability.
8. Repeat from step 3.

This loop relies on an ingenious continuous recycling of your Vehicle using Valkyrie's Call to catch it the moment it hits the graveyard, bypassing its normal creature restriction since it enters as a noncreature artifact. Every time the Vehicle drops back onto the battlefield, Simulacrum Synthesizer springs to life to churn out a massive Construct token, which in turn provides the perfect sacrifice fodder to fuel Megatog's ravenous appetite. By tapping that very same Construct to crew the Vehicle in the first place, you seamlessly bridge your artifact tokens and your sacrifice engine into an endless loop of creation and rebirth.