Orthion, Hero of Lavabrink + Boommobile + Seedcradle Witch

Orthion, Hero of Lavabrink

Boommobile

Seedcradle Witch

How it works

1. Activate Orthion's second ability by paying 6 and tapping it, creating five token copies of Boommobile with haste.
2. When the Boommobile tokens enter the battlefield, they trigger, adding 8 that can only be spent to activate abilities.
3. Activate Seedcradle Witch by paying 2, untapping Orthion and giving it +3/+3 until end of turn.
4. Repeat.

By leveraging the massive mana influx from Boommobile's entrance triggers, we can fuel Orthion, Hero of Lavabrink's expensive second ability to churn out five hasty copies of the Vehicle at once. Each wave of copies generates more than enough specialized mana to keep the loop going, allowing Seedcradle Witch to repeatedly untap Orthion and reset its activation cost. This creates an exponential cascade of artifacts entering and leaving the battlefield, leaving you with infinite damage, an infinitely large Orthion, and an overwhelming army of mechanical tokens.