The instant part does lose some value when the rest of the deck is all about slamming big permanents, but our good mana dorks should help us hold this up later in the game
Its effect certainly still feels as if it has use as an Ace Spec card, so its definitely not outside the realms of possibility
They donate their power and parts to new creatures each time they die
All Your Powers Combined: Azathot requires one of each monster type (Fusion, Synchro, Xyz) as its Xyz materials to activate its effect, and the way the series works it's meant that you use the other members of the archetype to pull that off
A six will visit every Attraction in the game, while a one will fail to visit every Attraction in the game
Perhaps the clearest ancestor is Retrace, the paradigm mechanic for repeatedly casting spells out of the graveyard (unlike Flashback and Unearth, which only work once)