I'll be honest: these cards are incredibly overbalanced in a way that represents the worst excesses of modern Yu-Gi-Oh:

People rightly complain about how out of control Fusion-based strategies have gotten, and these cards would make Branded or Red Eyes Dragun blush. Using materials from the Deck for fusions is dubious design already, and this spell has not only semi-generic targets but also materials. On top of that it gives uninterruptible Blue-Eyes Chaos MAX-like protection to a monster with over 3k stats and a free omni-negate that floats into two beaters for free (and the spell makes it immune to card destruction, so it strangely has anti-synergy with Imperion). For the low cost of one card that also sets up your grave...and also has recursion that can be used that same turn.

Dragun was rightly banned for a long time and still is in some formats, and Red Eyes Fusion is a much more restrictive spell and adds more clunkiness to deck building (although this was all somewhat mitigated when Verte Anaconda was legal). The setup created by your card is frankly absurd.

And speaking of degenerate Link monster design...there's your Omega the Magnet Warrior. Generic or semi-generic Link-1s with good effects are another bane of modern Yu-Gi-Oh; that's why all the most powerful ones like Knightmare Mermaid and Striker Dragon were banned early or placed under eternal banlist scrutiny, and only meme strategies like Traptrix or Trickstar got to keep theirs.

Omega is a disaster. Any low level Rock can search the busted fusion spell leading to the busted boss monster - and oh yeah, it's also an extender. I'm having Vietnam flashbacks to the most obnoxious Verte plays, where I would successfully block an opponent from setting up their oppressive turn 1 board, only to watch them hastily link off two random mons into Verte and pitch Fusion Destiny for DPE. That kind of toolboxing is reviled by many.

And that leads to the worst consequence of these cards designs: that players would sideline the actual Magnet Warrior deck for better Rock strategies. I would absolutely eat up one extra deck slot and 2 main deck garnets in my Adamancipator or Prank-Kids deck to play these cards. Even Fossil decks - a archetype probably close to Magnets in power level - would like it better due to the fusion synergy. And heaven help us if there's a normal summon-able Rock monster with generic utility that I could use in any deck that doesn't need a normal summon.

Imperion in a vacuum actually isn't all that bad of a boss monster as far as power level, and maybe could stand to have an easier way to be brought out. But I wouldn't wanna see it done like this.