Frantic Search + Izzet Boilerworks + Nivix Guildmage

Frantic Search

Izzet Boilerworks

Nivix Guildmage

How it works

1. Cast Frantic Search for 2.
2. Activate Nivix Guildmage's second ability targeting Frantic Search for 2.
3. Resolve the copied Frantic Search to draw 2, discard two, and untap 3 lands you control, one of which should be Izzet Boilerworks.
4. Repeat for infinite looting.