Requires

Idris, Soul of the TARDIS must be in hand, or in the command zone. Lithoform Engine must be on the battlefield. Basalt Monolith must be on the battlefield. Sphinx's Disciple must be on the battlefield. Encroaching Mycosynth must be on the battlefield. Mana needed: plus enough mana to pay for commander tax, if applicable

Steps

1. Cast Idris either from your hand or from the command zone by paying and commander tax, if applicable.
2. When Idris enters the battlefield, its imprint ability triggers, targeting Sphinx's Disciple.
3. Holding priority, activate Lithoform Engine's first ability by paying and tapping it, copying Idris' trigger, targeting Basalt Monolith.
4. Resolve both Idris triggers, exiling Basalt Monolith and Sphinx's Disciple.
5. During your next turn, activate Idris using Basalt Monolith's first ability by tapping it, adding .
6. Activate Idris using Basalt Monolith's second ability by paying , untapping it.
7. Sphinx's Disciple triggers, causing you to draw a card.
8. Repeat from step 5.

Results