If theres suitable replacement for Den Protector to continue a loop, then I can see Paradoxical Outcome as something that G/U ramp / Part the Waterveil decks want
It's where you land after you've built all the Constructed decks you want to or when your life has changed to be less accommodating to playing a ton of Magic , like when you get a full-time job, have children, etc
Winning each one, one-by-one was a true joy that I cannot easily put into words
Heres an Izzet Phoenix decklist playing four Irencrag Pyromancers: Creatures (12) Planeswalkers (4) Lands (23) Spells (21) The biggest problem this deck has is with Narset, Parter of Veils
You can always upgrade the tribe with generic upgrades like Metallic Mimic, Adaptive Automaton, Coat of Arms, or Door of Destinies too
Creature - Human Wizard Color tag templates(None) Sardian Avenger First strike, trample Whenever this creature attacks, it gets +X/+0 until end of turn, where X is the number of artifacts your opponents control