Arcane Bombardment + Inspiring Refrain + Jhoira's Timebug + Capture of Jingzhou + Time Warp

Arcane Bombardment

Inspiring Refrain

Jhoira's Timebug

Capture of Jingzhou

Time Warp

How it works

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

This brilliant time-twisting loop kicks off when you cast Inspiring Refrain, which immediately triggers Arcane Bombardment to let you freely cast copied extra turn spells like Capture of Jingzhou and Time Warp from your graveyard. Once Inspiring Refrain resolves and exiles itself with three time counters, Jhoira's Timebug steps in to effortlessly accelerate that clock by tapping to remove a counter. Between the Timebug's manipulation and the natural progression of your extra turns, those time counters vanish rapidly, allowing you to continually recast Inspiring Refrain for free and sustain an unbreakable chain of infinite turns.