This is a very lightly upgraded version of a $20 deck. 

The idea is to have Mikaueus+sack outlet+infinite sac fodder+additional wincon (if needed) on the field at the same time.  For the most part we want sac outlets to be wincons, though Blood Artist vairents are included to take out a table rather than a single target, or to kill with the altars even if they have an eldrazi. 

Transmute spells, while occasionally useful in their own right, are usually just bad demonic tutors.  The deck is built to have both sacoutlet wincons AND sac fodder at each CMC up the chain, so a transmute spell can get you either. 

There is a certain focus on ramp, since Mikaeus is 6 mana and you might very well need to cast him more than once from the command zone. 

The two biggest things the deck is missing in my opinion are board wipes and draw.  This is most likely because it started life as a super budget deck, but I think I want to build the deck out as is and modify it a bit at a time rather than trying to alter too much at once.