Activate all lands you control by tapping them, adding at least {5}{U}{U}{U}{U}.
Cast Turnabout by paying {2}{U}{U}.
Holding priority, activate Mischievous Quanar's morph ability by paying {1}{U}{U}, turning it face up.
Mischievous Quanar triggers, copying Turnabout.
Resolve the copy of Turnabout, untapping all lands you control.
Activate all lands you control by tapping them, adding at least {5}{U}{U}{U}{U}.
Activate Mischievous Quanar by paying {3}{U}{U}, turning it face down.
Repeat from step 3.

Infinite copies of instant and sorcery spells on the stack

Infinite magecraft triggers

Infinite mana permanents you control can produce

Mischievous Quanar

Turnabout

Cast Brass's Bounty by paying {6}{R}.
Holding priority, activate Mishchievous Quanar's morph ability by paying {1}{U}{U}, turning it face up.
Mischievous Quanar triggers, copying Brass's Bounty.
Resolve the copy of Brass's Bounty, creating at least eight Treasure artifact tokens.
Activate eight Treasures by tapping and sacrificing them, adding {4}{U}{U}{U}{U}.
Activate Mischievous Quanar's first ability by paying {3}{U}{U}, turning it face down.
Repeat from step 2.
If you control nine or more lands, this combo nets infinite Treasure tokens and mana, which you can then use to activate Mischievous Quanar to get infinite copies of any other instant and/or sorcery spell(s) on the stack.

Infinite artifact ETB

Infinite artifact LTB

Infinite artifact sacrifice triggers

Infinite artifact tokens

Infinite colored mana

Infinite Treasure tokens

Brass's Bounty

During an opponent's turn, after their upkeep step, activate all lands you control by tapping them, adding at least {4}{U}{U}{U}{U}.
Cast Reset by paying {U}{U}.
Holding priority, activate Mischievous Quanar's morph ability by paying {1}{U}{U}, turning it face up.
Mischievous Quanar triggers, copying Reset.
Resolve the copy of Reset, untapping all lands you control.
Activate all lands you control by tapping them, adding at least {4}{U}{U}{U}{U}.
Activate Mischievous Quanar by paying {3}{U}{U}, turning it face down.
Repeat from step 3.
 If lands you control can tap to produce at least {5}{U}{U}{U}{U}, this combo nets infinite mana, which you can then use to activate Mischievous Quanar to get infinite copies of any other instant and/or sorcery spell(s) on the stack.

Infinite mana lands you control can produce

Infinite untap of lands you control

Reset

Activate all lands you control by tapping them, adding at least {4}{U}{U}{U}{U}.
Cast Rude Awakening by paying {4}{G}.
Holding priority, activate Mischievous Quanar's morph ability by paying {1}{U}{U}, turning it face up.
Mischievous Quanar triggers, copying Rude Awakening.
Resolve the copy of Rude Awakening, untapping all lands you control.
Activate all lands you control by tapping them, adding at least {4}{U}{U}{U}{U}.
Activate Mischievous Quanar by paying {3}{U}{U}, turning it face down.
Repeat from step 3.
If lands you control can tap to produce at least {5}{U}{U}{U}{U}, this combo nets infinite mana, which you can then use to activate Mischievous Quanar to get infinite copies of any other instant and/or sorcery spell(s) on the stack.

Rude Awakening

Cast Mana Geyser by paying {5}.
Holding priority, activate Mishchievous Quanar's morph ability by paying {3}, turning it face up.
Mischievous Quanar triggers, copying Mana Geyser.
Resolve the copy of Mana Geyser, adding {1} for each tapped land your opponents control.
Activate Mischievous Quanar's first ability by paying {5}, turning it face down.
Repeat from step 2.
If opponents control nine or more tapped lands, this combo nets infinite mana, which you can then use to activate Mischievous Quanar to get infinite copies of any other instant and/or sorcery spell(s) on the stack.

Infinite card draw

Infinite colorless mana

Infinite draw triggers

Mana Geyser

Chromatic Orrery

Cast the additional instant or sorcery by paying its mana cost, targeting a single target.
Holding priority, cast Radiate by paying {3}{R}{R}, targeting that instant or sorcery.
Holding priority, cast Word of Seizing by paying {3}{R}{R}, targeting any permanent.
Holding priority, activate Mischievous Quanar's morph ability by paying {1}{U}{U}, turning it face-up.
Mischievous Quanar triggers, copying Radiate, targeting Word of Seizing.
Resolve the copy of Radiate, creating a copy of Word of Seizing targeting each other permanent.
Resolve all Word of Seizings, causing you to gain control of all permanents on the battlefield, and give them all haste until end of turn.

Gain control of all permanents until end of turn

Radiate

Word of Seizing

Mycosynth Lattice

Combos with "Mischievous Quanar"