Ertha Jo, Frontier Mentor + Clock of Omens + Oreskos Sun Guide + Liquimetal Torque

Ertha Jo, Frontier Mentor

Clock of Omens

Oreskos Sun Guide

Liquimetal Torque

How it works

1. Activate Liquimetal Torque by tapping it, causing Oreskos Sun Guide to become an artifact.
2. Activate Clock of Omens by tapping it and Oreskos Sun Guide, targeting Oreskos Sun Guide.
3. Ertha Jo triggers, copying Clock of Omens' ability, targeting Clock of Omens.
4. Resolve both Clock of Omens abilities, untapping it and Oreskos Sun Guide.
5. Oreskos Sun Guide triggers, causing you to gain 2 life.
6. Repeat from step 2.

This elegant loop uses Liquimetal Torque to turn Oreskos Sun Guide into an artifact, satisfying the artifact requirement for Clock of Omens. When you tap the Clock and Oreskos Sun Guide to activate the Clock's untap ability, Ertha Jo, Frontier Mentor steps in to copy it because the ability targets a permanent. This generates enough untap triggers to untap both the Clock and Oreskos Sun Guide, while also triggering the Sun Guide's inspired ability to gain 2 life each iteration.