The upkeep cost is real, but even if you just cast this demon to turn your life into death rays and then let it go to the graveyard, it's a pretty good deal
Alternatively, you can stockpile your extra life and get benefits from cards like Caduceus, Staff of Hermes or Serra Ascendant
Put the rest on the bottom of your library in a random order. While three or less might not sound like much, MTG is full to bursting with cards which only cost three mana or less that can win a game
The original reaction among Magic players was somewhat split
This MTG Arena deck uses Cryptbreaker to not only create tokens and fill up the graveyard, but also draw cards at will as well
and Bellwether, the ambitious sheep who plays a pivotal role in the story