Shelob, Child of Ungoliant + Fleetwheel Cruiser + Maskwood Nexus + Psionic Sliver

Shelob, Child of Ungoliant

Fleetwheel Cruiser

Maskwood Nexus

Psionic Sliver

How it works

1. Activate Fleetwheel Cruiser by tapping it, dealing 2 damage to any target and three damage to itself.
2. Fleetwheel Cruiser dies as a state-based action due to having zero or less toughness.
3. Shelob triggers, creating a token copy of Fleetwheel Cruiser that is a Food artifact.
4. When the Fleetwheel Cruiser token enters the battlefield, it triggers, causing it to become an artifact creature until end of turn.
5. Repeat.