Your hands are tiny.

1 drop

Despise/Thoughtseize - Early discard.

2 drop

Spirit of the Labyrinth - Generally swings through Caryatid. Makes up for Master of the Feast. Hampers Waste Not a little bit, but I'm okay with that.

Sign in Blood - If you have Spirit of the Labyrinth out, just cast it on the opponent.

Waste Not - Tokens are the key here.

Bile Blight - Took out Downfall for these, in favor of more B. Light (see what I did there?) for Devotion and a wider range of exile targets.

3 drop

Athreos, God of Passage - Will probably keep your hand populated even if Spirit of the Labyrinth is out. Great with Black Cat. Good chance of being activated in this deck.

Banishing Light - Removal & devotion for Athreos.

Master of the Feast - Turn 3 fatty. With all the discard, plus Spirit of the Labyrinth, the draw shouldn't be too big a problem.

Rakshasa's Secret - Discard plus a little help for Delve/Liliana if it comes down to graveyard shenanigans.

Tormented Thoughts - Good for canceling out Master of the Feast if it's gotten out of hand (no pun intended) without Spirit or discard taking care of it.

4 drop

Whip of Erebos - Lifelink could be big with Master of the Feast.

X drop

Empty the Pits - If your Waste Not tokens have been going well, this should win you the game. Against control, try to sneak it in whenever they're tapped out, don't hold onto it too long.