Spells with harmonize can be cast from your hand normally, but you also have the option to cast them from your graveyard, giving you plenty of options for recursion as the game goes on
You can do that each turn, power it up with Electricity Generator [Scarlet and Violet], and theme a whole deck around that
The deck is led by Isperia, Supreme JudgeIsperia, Supreme Judge Isperia gives you cards whenever a creature attacks you or a planeswalker you control, so it's possible to draw quite a bit from her, but it's also likely for opponents to just play around that by attacking with one huge creature or by trying to take you out in one swing
It does three things we love: recursion, free equips and instant speed equips
There's a ton of directions you can take it, so many cards to choose from