Legendary_penguin_of_death Deckling

18 lands is quite skimpy. I would add 4 Renegade Map and some number of Traveler's Amulet. Also Aetherflux Reservoir is the only realistic way to win so you should probably have 4

Vona's Hunger, Doomfall, Trial of Ambition, Torment of Scarabs, Torment of Venom, and The Eldest Reborn is all I can think of off the top of my head.

I would change this to modern

Your land base is pretty rough but the rest looks good. 5 red sources in the entire deck just won’t be consistent enough. You should add more duals. The lands may enter tapped more often but better that than never finding a color. I would go 3 Spirebluff Canal 3 Sulfur Falls 1 Irrigated Farmland.

Cut 2 plains 4 islands 1 mountains

I’m sure those numbers aren’t exactly correct but I think it will improve consistency.

Try to pick 10 cards and use all as 3-4 ofs. It’s hard to give suggestions when the deck is a massive list of 1 or 2 ofs.

Mono White Angels

This is what I typed in 08-06-18-mono-white-angels but in brackets. It’s found on the end of the url

Also, I think Vapor Snag is better than Unsummon.

Vodalian Arcanist and Sparring Construct seem to be weaker than the rest of the deck. Perhaps try Siren Stormtamer and Spire Golem

Ok one last question. What archetype are you going for: Ramp, counters, enter the battlefield triggers, reanimating, beat down?

Is your maybe board cards you already have? Or are those cards you hope to get? I can give you some advice if you are willing to buy cards. Could you just clarify how you want advice given?