Mulligans
General Mulligans
Imprisoned Homunculus: Imprisoned card are best played on curve due to their delay before they actually hit the field
Sethekk Veilweaver: Sethekk Veilweaver can be a gamewinning card, especially when buffed by the numerous buff cards, especially Psyche Split, which can make it quickly spiral out of control for the opponent
Twilight Drake(or any other dragon): This deck has a low amount of dragons, and I often find myself relying on the 15% chance of getting a dragon off of an invoke to make my dragon loving cards trigger, so you should keep dragons, especially if you have a dragon-lover.