If able, activate Throne of Eldraine's first ability by tapping it, adding {U}{U}{U}{U} that can only be spent to cast blue monocolored spells.
Cast Whim of Volrath with buyback by paying {2}{U}, targeting Displacer Kitten.
Displacer Kitten triggers, blinking Throne of Eldraine. Choose "Blue" as it enters the battlefield.
Resolve Whim of Volrath, returning it to your hand.
Repeat.

Infinite creature LTB

Infinite creature ETB

Infinite storm count

Infinite blinking of nonland permanents

Infinite magecraft triggers

Infinite colored mana that can only be spent to cast monocolored spells

Displacer Kitten

Throne of Eldraine

Whim of Volrath

If able, activate Throne of Eldraine's first ability by tapping it, adding {U}{U}{U}{U} that can only be spent to cast blue monocolored spells.
Cast Clockspinning with buyback by paying {3}{U}, targeting Displacer Kitten.
Displacer Kitten triggers, blinking Throne of Eldraine. Choose "Blue" as it enters the battlefield.
Resolve Clockspinning, returning it to your hand.
Repeat.

Infinite proliferate

Clockspinning

If able, activate Throne of Eldraine's first ability by tapping it, adding {U}{U}{U}{U} that can only be spent to cast blue monocolored spells.
Cast Mind Games with buyback by paying {2}{U}{U}, targeting Displacer Kitten.
Displacer Kitten triggers, blinking Throne of Eldraine. Choose "Blue" as it enters the battlefield.
Resolve Mind Games, returning it to your hand.
Repeat.

Mind Games

If able, activate Throne of Eldraine's first ability by tapping it, adding {U}{U}{U}{U} that can only be spent to cast blue monocolored spells.
Cast Mystic Speculation with buyback by paying {2}{U}, targeting Displacer Kitten.
Displacer Kitten triggers, blinking Throne of Eldraine. Choose "Blue" as it enters the battlefield.
Resolve Mystic Speculation, causing you to scry 3 and return it to your hand.
Repeat.

Infinite scry

Mystic Speculation

If able, activate Throne of Eldraine's first ability by tapping it, adding {R}{R}{R}{R} that can only be spent to cast red monocolored spells.
Cast Haze of Rage with buyback by paying {3}{R}.
Displacer Kitten and Haze of Rage's storm ability trigger.
Resolve the Displacer Kitten trigger, blinking Throne of Eldraine. Choose "Red" as it enters the battlefield.
Resolve the Haze of Rage trigger, creating a copy of it for each spell you've cast before it this turn.
Resolve all Haze of Rages, giving creatures you control +1/+0 until end of turn for each Haze of Rage, and returning the original Haze of Rage to your hand.
Repeat.

Infinitely powerful creatures you control until end of turn

Haze of Rage

If able, activate Throne of Eldraine's first ability by tapping it, adding {R}{R}{R}{R} that can only be spent to cast red monocolored spells.
Cast Seething Anger with buyback by paying {3}{R}, targeting Displacer Kitten.
Displacer Kitten triggers, blinking Throne of Eldraine. Choose "Red" as it enters the battlefield.
Resolve Seething Anger, giving Displacer Kitten +3/+0 until end of turn, and returning Seething Anger to your hand.
Repeat.

Seething Anger

If able, activate Throne of Eldraine's first ability by tapping it, adding {W}{W}{W}{W} that can only be spent to cast white monocolored spells.
Cast Recruit the Worthy with buyback by paying {3}{W}, targeting Displacer Kitten.
Displacer Kitten triggers, blinking Throne of Eldraine. Choose "White" as it enters the battlefield.
Resolve Recruit the Worthy, creating a 1/1 Soldier creature token and returning it to your hand.
Repeat.

Infinite creature tokens

Recruit the Worthy

If able, activate Throne of Eldraine's first ability by tapping it, adding {G}{G}{G}{G} that can only be spent to cast green monocolored spells.
Cast Wurmcalling with buyback by paying {2}{G}{G}.
Displacer Kitten triggers, blinking Throne of Eldraine. Choose "Green" as it enters the battlefield.
Resolve Wurmcalling, creating a 0/0 Wurm creature token and returning Wurmcalling to your hand.
The Wurm enters the battlefield and dies as a state-based action due to having 0 toughness.
Repeat.

Infinite death triggers

Wurmcalling

If able, activate Throne of Eldraine's first ability by tapping it, adding {W}{W}{W}{W} that can only be spent to cast white monocolored spells.
Cast Change of Heart with buyback by paying {3}{W}, targeting Displacer Kitten.
Displacer Kitten triggers, blinking Throne of Eldraine. Choose "White" as it enters the battlefield.
Resolve Change of Heart, returning it to your hand.
Repeat.

Change of Heart

If able, activate Throne of Eldraine's first ability by tapping it, adding {W}{W}{W}{W} that can only be spent to cast white monocolored spells.
Cast Anoint with buyback by paying {3}{W}, targeting Displacer Kitten.
Displacer Kitten triggers, blinking Throne of Eldraine. Choose "White" as it enters the battlefield.
Resolve Anoint, returning it to your hand.
Repeat.

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