I have a notion that a Five Color deck would be a fun budget challenge
Heres the breakdown by goal
It will go for hundreds of dollars, potentially thousands if the card ends up being good, and its the one thing you really want to open in the set
It also increases the likelihood of successfully killing your opponent via poison counters
What is going to be interesting is not just which Modal Double-Faced Cards are playable in the abstract, but how deck with lots of them line up against decks without very many
Jerren, Corrupted Bishop / Ormendahl, the Corrupter There are better ways to manage the sacrifice creatures, lose life, gain cards, gain life, repeat structure of black decks, but Jerren, Corrupted Bishop is one of the more flexible versions of that