This website is devoted to improving players' draft skill.
It uses deep learning to approximate players' decisions made during MTG draft. Here you can play draft in almost any format vs 7 bots and then compare your picks with the ones suggested by AI.
Training is done in online mode. This means one training step is done after website has accumulated some number of picks (actually, 8) made by human players. For every new format AI starts with a predefined bias (it picks cards with higher rarity and matching color) but as people play more and more drafts of that format, AI begins to understand logic behind picks and gradually gets smarter.
You can also get feedback from AI in form of P1P1 card rating for each format. That list is also being reevaluated after each training step.