Whispersilk Cloak for 3 turn commander damage

Mana base is all wastes? What a waste .... you should definitely add some non-basics to add flexibility.

Probably some more ramp wouldn't hurt, with a side of card draw

+1 because it's your deck. Sadly, I don't have any input for the deck at this time. Should anything changes, I'll let you know. Keep up the good work my good fellow.

SacredAtsira Fair point. How about other general utility such as Deflecting Swat? Or are you look for suggestions that boost overall synergy rather than just powerful cards that improve the deck? I love swat so much. It redirects targetted removal, draw, extra turns and more! The ability to bluff with commander on board can be a powerful deterrent in some cases if you politic correctly. I wish I had more synergistic suggestions for you. I do like this deck, I would love to play this deck as a Norin player. You would always have a min of 2 power on board, seems fun to pilot as well to play against.

Toxic Feminism deck cycle of International women's day. Was that intentional? Lol

+1 for name alone

+1 for name and description. Sadly, I don't play boros, but what about Generous Gift?

+1 my good fellow, great deck description. Not my cup of tea, but I enjoyed drinking it. Hope you get some good games in

I got a lot of thoughts I want to share with you. You have no budget, awesome! I'll provide you with a list of suggestions later but first, I want to provide you with the general thought process of a typical Xenagos deck and then see what direction you want to take yours in.

The deck plays like a sniper, casting one large creature at a time, so it plays tall rather than going wide with a bunch of creatures. To do this efficiently, you use land ramp and/or mana dorks. Once you ramp into Xenagos, you cast one big beater at a time, preferably holding up a buff/protection spell. You also need a lot more draw, you will run out of gas fairly quickly. You do not notice this as much given your less ramp and higher CMC, but once optimize your deck, it will be very noticeable.

What purpose does Staff of Compleation serve? First ability prevent theft in case of lack of homeward path. 2nd is mana. 3rd is ??? 4th I understand and 5th is nice with infinite mana or just a lot of excess mana late game.

Is the primary purpose of Monument to Perfection as a land ramp or alt wincon to be buffed? If it's the latter, then I understand. If it's the former, have you considered Thaumatic Compass  ^Flip? Given wayfairers, burnised and the map, you ramp land to field surprisingly well. It is also easier to activate and turns itself into a land making it harder to destroy. Given your voltron wincon, G-d + Disciple wincon, if the primary purpose of Monument to perfection is an alt wincon, is that necessary in your deck?

Idyllic Tutor - I'm having trouble seeing the value in this here. You have 6 enchantments. Test of endurance wincon which is telegraph from cast of tutor to cast of spell, waiting a turn to hope it stays on board. Land tax which is usually best early game. Blind obedience which is good against creature heavy decks, extort is great too. Aura of silence is great, just unsure if its worth a tutor target IMO. Smothering Tithe is always good. Despite the above, would you not be better served by something that more directly relates to your core strategy? Not sure if I brought any of this info up before so I apologize if I'm repetitive but a Conqueror's Flail might be worth looking into. I notice you have cavern so there is blue somewhere in the meta. Not to mention that Flail requires opponents to respond then and there or not at all, putting them in awkward positions.

How has Horizon stone worked for you? Seems a bit expensive for what it does. Have you considered swapping it with another utility spell that might be more beneficial towards your needs? Vedalken Orrery allows you to respond rather than be responded to. Helps deter interaction spells in your meta, leaves opponents guessing. You're playing the Eldrazi that can counter spells, if you're gonna act like a blue player, might as well go all the way with it. Neither Horizon stone nor Orrery are necessary towards your plan, you'd probably be better off with something else entirely, but Orrery has put in some serious work in more casual- semicompetitive games which it seems like this deck is built for.

Another card to consider is Commander's Plate.

Why do you have 4 wastes, are there cards that draw basics from the deck that I'm missing? It seems like ..... a waste slow clap .... Urza's Mine, Urza's Power Plant and Urza's Tower can be swapped in for ramp. I'm sure theres some synergy with the artifact cards that deal with land mana abilities. Bonders' Enclave could be the 4th land swap should you feel you need more draw in a pinch that doesn't anti-synergize with your pay life for mana abilities card (not that it's a huge difference one way or the other, but redundancy is nice)

What purpose does liquid metal tongue and welding jar serve? The former is a mana rock with some fringe benefit I'm missing. The latter seems like telegraphed protection, not bad, just not that great IMO. Most artifact removal I've experienced is in the form of wipes, perhaps your experience is different. How have both of those cards played for you?

A potential swap for either could be Everflowing Chalice as it has the flexibility of scaling and most importantly, acts as another combo line for Rings + Voltaic Key.