How can you create a combo with Idris, Soul of the TARDIS, Lithoform Engine, Basalt Monolith, Sphinx's Disciple, Ashnod's Transmogrant?
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[START OF COMBO]This combo can be formed with Idris, Soul of the TARDIS, Lithoform Engine, Basalt Monolith, Sphinx's Disciple, Ashnod's Transmogrant

Color identity: UR
Mana cost: {3}{U}{R} plus enough mana to pay for commander tax, if applicable
Steps:
  1. Activate Ashnod's Transmogrant by tapping and sacrificing it, putting a +1/+1 counter on Sphinx's Disciple and causing it to become an artifact.
  2. Cast Idris either from your hand or from the command zone by paying {1}{U}{R} and commander tax, if applicable.
  3. When Idris enters the battlefield, its imprint ability triggers, targeting Sphinx's Disciple.
  4. Holding priority, activate Lithoform Engine's first ability by paying {2} and tapping it, copying Idris' trigger, targeting Basalt Monolith.
  5. Resolve both Idris triggers, exiling Basalt Monolith and Sphinx's Disciple.
  6. During your next turn, activate Idris using Basalt Monolith's first ability by tapping it, adding {C}{C}{C}.
  7. Activate Idris using Basalt Monolith's second ability by paying {3}, untapping it.
  8. Sphinx's Disciple triggers, causing you to draw a card.
  9. Repeat from step 6.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Infinite draw triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Idris, Soul of the TARDIS must be in your 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
  - Ashnod's Transmogrant must be on the battlefield
[END OF COMBO PREREQUISITES]
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