Zask, Skittering Swarmlord + Universal Automaton + Winding Canyons + Thermopod

Zask, Skittering Swarmlord

Universal Automaton

Winding Canyons

Thermopod

How it works

1. Activate Winding Canyons' second ability by paying 2 and tapping it, allowing you to cast creature spells as though they have flash this turn.
2. Cast Universal Automaton from your hand or graveyard by paying 1.
3. Activate Thermopod by sacrificing Universal Automaton, adding 1.
4. When Universal Automaton dies, Zask triggers.
5. Holding priority, cast Universal Automaton from your graveyard by paying 1.
6. Resolve the Zask trigger, causing you to mill two cards.
7. Repeat from step 3.