Cast Inspiring Refrain by paying {4}{U}{U}.
Arcane Bombardment triggers, exiling a random instant or sorcery from your graveyard, and then casting a copy of Time Stretch without paying its mana cost.
Resolve the Time Stretch copy, causing you to take two extra turns after this one.
Resolve Inspiring Refrain, causing you to draw two cards and exile Inspiring Refrain with three time counters on it.
Activate Jhoira's Timebug by tapping it, removing a time counter from Inspiring Refrain.
Move to your first extra turn, removing a time counter from Inspiring Refrain during your upkeep.
Move to your second extra turn, removing a time counter from Inspiring Refrain during your upkeep.
Inspiring Refrain triggers, causing you to cast it from exile without paying its mana cost.
Repeat from step 2.

Infinite turns

Lock

Arcane Bombardment

Inspiring Refrain

Jhoira's Timebug

Time Stretch

Cast Inspiring Refrain by paying {4}{U}{U}.
Arcane Bombardment triggers, exiling a random instant or sorcery from your graveyard, and then casting a copy of Temporal Manipulation and Time Warp without paying their mana costs.
Resolve the Temporal Manipulation and Time Warp copies, causing you to take two extra turns after this one.
Resolve Inspiring Refrain, causing you to draw two cards and exile Inspiring Refrain with three time counters on it.
Activate Jhoira's Timebug by tapping it, removing a time counter from Inspiring Refrain.
Move to your first extra turn, removing a time counter from Inspiring Refrain during your upkeep.
Move to your second extra turn, removing a time counter from Inspiring Refrain during your upkeep.
Inspiring Refrain triggers, causing you to cast it from exile without paying its mana cost.
Repeat from step 2.

Time Warp

Temporal Manipulation

Deal combat damage to an opponent using Medomai the Ageless.
Medomai the Ageless triggers, causing you to take an extra turn after this one.
Cast Idris by paying {1}{U}{R}.
When Idris enters the battlefield, it triggers, exiling Medomai the Ageless until Idris leaves the battlefield.
Activate Jhoira's Timebug by tapping it, putting a time counter on Idris.
Move to your extra turn.
At the beginning of your upkeep, Idris's vanishing ability triggers, removing a time counter from it.
Deal combat damage to an opponent using Idris.
Idris triggers, causing you to take an extra turn after this one.
Repeat from step 5.

Combos with "Jhoira's Timebug"