This is where the cards with written descriptions. They're kept because the reader may want to see what I thought about them or how they worked in the deck. The other reason is I'm lazy and if I want to them back I have a starting point.
Archon of Absolution - 2 toughness is rough compared to other creatures that add a cost to attacking us and Planeswalkers, like Archangel of Tithes & Baird, Steward of Argive. It makes up for this with protection. The protection from white helps with Path to Exile, Swords to Plowshares and their ilk. There's also some synergy with Eight-and-a-Half-Tails. We shouldn't underestimate flying when it comes to protecting our Ugins.
Buried Ruin - One of the few ways to reacquire a sacrificed egg but it's also away to bring back any of our artifacts that were too scary for the table, ieAetherflux Reservoir or The Chain Veil.
FarewellGC - Austere Command gave us two of four choices. FarewellGC gives four options and we can take any or all of them. Oh, and destroy is so passé. FarewellGC is more than a name it's what happens after it resolves. Everything we choose will be exiled. Planeswalkers cannot be chosen so the Ugins will all be safe. Graveyards will almost always be chosen.
Forsaken Monument - Helps to pull us out of bad situations. The life gain can pull us back into a game. The extra mana let's us play more spells (really good with Mystic Forge), and the +2/+2 to our colourless creatures adds extra protection and can let us turn the corner. Works really well with Glaring Fleshraker generating an army out of nowhere.
Ghost Vacuum - This is not only a good piece of graveyard removal it's also an investment. As the game goes long we can gather a bunch of creatures and release them after a board wipe or when we need emergency blockers.
Gold Myr - There's going to be a few colourless mana dorks in this section. We're playing these over straight mana rocks because we need to be able to ramp AND we need to block to protect our Ugins.
Honor-Worn Shaku - It can be a better Worn Powerstone in many situations. It's true we don't have many legendary creatures but Honor-Worn Shaku is inclusive and we can tap any legendary permanent to get another . Planeswalkers and legendary artifacts can now, essentially, tap for mana.
Land Tax - Mono white has ALMOST no ramping land search in it. MOST of it searches for lands to catch up with other players with no guarantee that the lands come into play immediately. That precedent was set by Land Tax. At its best turn 1, although Lotus Petal no land drop can change that, but anytime we're behind on lands it's always a welcome sight. Every upkeep we'll be thinking about the number of cards in our hand, add in a draw and what spells we'll be playing. In most circumstances we want to take as many Snow-Covered Plains as possible but trying not to discard cards. There are a couple of key interactions with our other cards.
Lembas - to scry and draw a card in white isn't the worst deal. We can then sac it to gain 3 and have the Opportunity to do it again.
Oswald Fiddlebender - This isn't a dedicated Fiddlebender deck and this isn't a completely dedicated artifact deck. That doesn't mean that Ossie isn't helpful. There are few key artifacts, The Chain Veil & Aetherflux Reservoir, we want on the battlefield. As we can climb we can Sacrifice our smaller cards along the way to them, as per normal.
If nothing else Oswald Fiddlebender has a reputation and may just jump out and tell the table "Hey! Look at me! I'm a distraction." One less removal spell to point at Ugin.
PuPu UFO - Cheap efficient blocker with flying. When played early we can go from three lands to four. Good friends with Land Tax, depending on how much ramping our opponents do. It may just be stuttering ramp. As far as the UFO gaining power through it's own ability...think again. Blasted Landscape could be a Capital City there really aren't any towns we want to play. One other thing...PuPu can't put MDFC lands into play when the land part is on the flipped side.
Rest in Peace - It's a necessary evil to stop our reanimator opponents from crushing us. It's a highly efficient form of graveyard removal. Yes, it's a non-bo with: Abstergo Entertainment, Arena Rector & Haven of the Spirit Dragon.
Thalia's Lancers - Functioning as a back-up Djeru. A 4/4 first strike for is a good rate. That AND a search for a legendary card makes it perfect for our deck.
Vexing Bauble
- The floor on this card is draw a card, great value for mono white. On a macro level, the card pool Commander players can draw from anything from Magic's history. There are relatively few free spells but, every colour has a few good ones. bauble protects us from all of them. This includes our own cost cards, spells which have been reduced to and Mama Ugin's ultimate ability. Luckily, there's a built in escape where we can pay , Sacrifice it and draw a card. Plan ahead!