Burning Pact

Jorbs

Understanding the strength of Burning Pact is instructive, I think: If you draw through your deck quickly, exhausting all of the bad cards from it, you can end up with only your good cards left. That might mean a combo of cards which go infinite, or a few cards which are upgraded and strong for the fight you're in, or some cards which massively increase your Strength... something like that. Burning Pact is one of the simpler cards for that job. It does both halves; it draws through your deck faster, and exhausts a card while it's doing so.

Baalorlord

This card 'accelerates' your deck by both removing bad cards as well as drawing new ones to immediately replace the exhausted card. Combine with energy generation from something like Bloodletting and you can play many more cards per turn.