Background:

After playing with Hellraiser in Explorer for a bit I realized that my primary assumption about the card was wrong. I thought the card would only be good if one used discard as a way to fill the graveyard (as opposed to mill which puts random cards into the bin). As long as the mill is on a playable card though hellraiser is good. Even if the chance to whiff is sicnificantly increased so is the chance to play the card for cheaper.

In Standard indominitable creativity is nowhere to be seen, so I tried to remember some mill cards I played before and found Jace and Maestros Charm as convenient options. As you can see I ultimately decided to cut the Jace here (as the deck never wins with mill and as Jace is pretty poor card selection).

Basic Concept: The deck tries to find the two most prevalent combo pieces, galvanic iteration and invoke despair to burn out the opponent. Big score is used as ramp. Big score and maestros charm are here to find the pieces. This deck has been played marginally in the past, although I really enjoyed it. Fortunally some new cards have been introduced in the meantime that make the deck way better than before.

1. Fast lands. The deck is very color intensive and struggled with damage due to playing too many pain lands. The new lands are a substantial upgrade

2. Hellraiser. This card is here instead of lier, which I previously played in the sideboard. I added a third copy because the deck performed well with 2. Obviously Hellraiser has to be treated like any 6-drop for deck-building since that's what it is in the early to mid-game. Additional Hellraisers mean more tension as the need for self-mill increases - which is tempo negative.

3. Jace. I had some success with Jace too, but I reflected that overall Jace wants to do his own thing more than he contributed to the combo kill. If a deck wants to go more in on self mill then Jace could be the way to do that.

Other than that there is certainly some wiggle-room. Might play more iterations, might play another charm. Might even play some value creatures.