The list hasn't been updated for a year, doubt the authors are still active here

Harmonic Prodigy doubles both the triggers from Baeloth Barrityl, Entertainer & Noble Heritage since background abilities originates from the creature commander. Worth keeping in mind for other creature/background pairings where triggers and wizards/shamans are involved.

Oh and here's my Baeloth deck in case you want some more card inspiration

Lord Baeloth, the Voltron Entertainer

(didn't want to use your deck's comment space as ad space)

Hello fellow Noble!Baeloth aficionado, just wanted to pop in to suggest Harmonic Prodigy since it works with both Baeloth's Treasure triggers and Noble Heritage's counter triggers (because it actually gives the ability to Baeloth, who is a Shaman).

Criminal Past also naturally leads you to Tombstone Stairwell, an already innately funny card that becomes super-charged with Baeloth; if you can just buff him to at least 3 power, those tokens are going to slam into each other turn after turn, netting you Treasures which you can use to pay for the cumulative upkeep while your opponents continually take incidental damage.

Oh yeah and it's obvious since it can form a backup commander for the precon with Baeloth, but Clan Crafter is probably the best choice if you want to go izzet. Making all Treasures into Clues which also pump him isn't too bad.

(Tavern Brawler sadly only lasts until EOT, so you don't get to use the bonus to goad things into attacking for mono-red.)

Yeah I find that you need to time things carefully when it comes to settings things up for both having Jon and a gift out; at least being able to bluff a counterspell is nice. Demonic Taskmaster has been cool in that it's actually OK to cast early on its own.

DrukenReaps: it took forever but I finally got off my ass and completed the Irenicus deck

Every day I mourn that Dragon's Rage Channeler doesn't actually turn into a Dragon at Delirium for the purpose of Firkraag, Cunning Instigator

Not to be confused with Lorcan

For izzet Dragon tribal, I feel like Lozhan, Dragons' Legacy immediately got its thunder stolen by Ganax, Astral Hunter + Feywild Visitor, which is kinda sad

Backgrounds, especially the cheaper ones, makes the bonuses from e.g. Fierce Guardianship or Jeska's Will quite reliable since Enchantments are less likely to get randomly removed

TT already posted in it, but I made a writeup on Chaos God colors:

https://tappedout.net/mtg-forum/blind-eternities/warhammer-40k-chaos-gods-color-identity/

Viconia, Drow Apostate looks like a cat-person and it's weird. Maybe it's supposed to be a reference to her goofy BG1 portrait?