You may be wondering why Mangara is used at all as a champion. Mangara has a tap ability that exiles himself and another target permanent, although there's a mechanic in Magic that allows his self-imposed exile to be interrupted by untapping or bouncing Mangara. Supposedly this is due to Mangara's imposed exile being part of the result rather then the cost.
Cards are set in groupings, and in each grouping the cards are alphabetized rather then grouped further by purpose, it should be easy to see which cards have the same effects. The sideboard's metagame is set against creature generation with sprinklings of control.
This section is currently lacking. I will return.
There are a few combos in the deck.
Infinite Mana Combo = Rings of Blighthearth + Basalt Monolith
The only purpose of this combo is to help play high cost things, or end the game with Diviner's Wand.
Recurring Oblivion = Dust Elemental + Mangara
Not an infinite, and somewhat mana intensive. Dust Elemental in the deck is useful for bouncing Mangara, replaying and reusing him, although it's not as safe as blinking him due to counters. Dust Elemental's bounce has utility with Mangara as well as various other come-into-play creatures used in the deck. Other then that it's a decent beater.
Karmatic Justice = Reveillark + Karmatic Guide + Blasting Station
Out of the three I think I like Swords to Plowshares more, as well as the idea of being slightly less reliant on Mangara, although Oust probably has about the same utility since it delays the opponent's champion, should they rush it.
I've been tentative about Path to Exile since it spots them a free land, but I suppose it might be worth the trade, exiling a creature and all.
ugh... stuck in monowhite and no haste for mangara... seems like an uphill battle to build a competitive deck. not to be defeatist but I almost feel like running a multicolor general and having mangara in the deck accessible via tutoring and recursion would be superior. The deck would still be built around him but it would be so much more powerful IMO.
Yes thousand-year elixir makes this mono white version viable for sure. 2 removals in one and granting him haste. I suppose that is the first item you tutor for... then add in voltaic key and etc... yes it makes sense. But the rest just has this feel of being filler you know? IDK, it's definitely an intellectual challenge so best of luck to ya man.