Ertha Jo, Frontier Mentor + Clock of Omens + Sphinx's Disciple + Liquimetal Coating

Ertha Jo, Frontier Mentor

Clock of Omens

Sphinx's Disciple

Liquimetal Coating

How it works

1. Activate Liquimetal Coating by tapping it, causing Sphinx's Disciple to become an artifact.
2. Activate Clock of Omens by tapping it and Sphinx's Disciple, targeting Sphinx's Disciple.
3. Ertha Jo triggers, copying Clock of Omens' ability, targeting Clock of Omens.
4. Resolve both Clock of Omens abilities, untapping it and Sphinx's Disciple.
5. Sphinx's Disciple triggers, causing you to draw a card.
6. Repeat from step 2.

This clever loop transforms an ordinary mechanical pairing into an engine for infinite card draw by turning your non-artifact creatures into steel-and-cogs machinery using Liquimetal Coating. Once everything is an artifact, you tap Clock of Omens alongside the newly-minted artifact Sphinx's Disciple to untap the Clock, triggering Ertha Jo, Frontier Mentor to copy the ability and untap the Sphinx as well. This inspired untapping of Sphinx's Disciple causes you to draw a card, fueling an endless cycle of tinkering that lets you draw your entire deck in formats like commander, legacy, modern, oathbreaker, and vintage.