Cast any other spell, or wait for an opponent to cast one.
Cast Hinder by paying {1}{U}{U}, targeting that spell.
Thousand-Year Storm and Thrumming Stone trigger.
Resolve the Thousand-Year Storm trigger, creating at least one copy of Hinder, with each copy targeting the original Hinder.
Resolve the first copy of Hinder, countering the original Hinder and putting it on top of your library.
All remaining Hinder copies fizzle due to no longer having a legal target.
Resolve the Thrumming Stone trigger from step 3, revealing the top four cards of your library and casting Hinder without paying its mana cost.
Repeat from step 3.

Infinite magecraft triggers

Infinite storm count

Thrumming Stone

Hinder

Thousand-Year Storm

Cast Bonus Round by paying {1}{R}{R}.
Thrumming Stone triggers, revealing the top four cards of your library and putting them on the bottom of your library.
Resolve Bonus Round, copying all instants and sorceries cast after it this turn.
Cast any other spell, or wait for an opponent to cast one.
Cast Hinder by paying {1}{U}{U}, targeting that spell.
Bonus Round and Thrumming Stone trigger.
Resolve the Bonus Round trigger, creating a copy of Hinder, targeting the original Hinder.
Resolve the copy of Hinder, countering the original Hinder and putting it on top of your library.
Resolve the Thrumming Stone trigger from step 6, revealing the top four cards of your library and casting Hinder without paying its mana cost.
Repeat from step 6.

Bonus Round

Cast any other spell, or wait for an opponent to cast one.
Cast Hinder by paying {1}{U}{U}, targeting that spell.
Swarm Intelligence and Thrumming Stone trigger.
Resolve the Swarm Intelligence trigger, creating a copy of Hinder, targeting the original Hinder.
Resolve the copy of Hinder, countering the original Hinder and putting it on top of your library.
Resolve the Thrumming Stone trigger from step 3, revealing the top four cards of your library and casting Hinder without paying its mana cost.
Repeat from step 3.

Swarm Intelligence

Cast any other spell, or wait for an opponent to cast one.
If you cast the spell, Displacer Kitten triggers, blinking Chandra.
Cast Hinder by paying {1}{U}{U}, targeting that spell.
Chandra, Displacer Kitten and Thrumming Stone trigger.
Resolve the Chandra trigger, creating a copy of Hinder, targeting the original Hinder.
Resolve the copy of Hinder, countering the original Hinder and putting it on top of your library.
Resolve the Displacer Kitten trigger, blinking Chandra.
Resolve the Thrumming Stone trigger from step 3, revealing the top four cards of your library and casting Hinder without paying its mana cost.
Repeat from step 4.

Search Results