Throne of Eldraine's chosen color is not "Red" available.
Steps
If able, activate
Throne of Eldraine's first ability by tapping it, adding ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) that can only be spent to cast red monocolored spells.
Cast
Haze of Rage with buyback by paying ({3} magic symbol) ({R} magic symbol) .
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.
Results
Infinite storm count.
Infinite magecraft triggers.
Infinite power for creatures you control until end of turn.