I drafted GB Delirium and went (1-2) in matches.

I thought the deck turned out all right, but it definitely did not have good removal or even enough removal. While I was drafting I was trying to get enough payoff cards for Delirium, but I found myself having to pass a lot of the enablers. In this draft the packs seemed to force me to choose between enablers and payoffs each time. I found out afterwards that the person to my left was also GB and that the person two seats to my right was ALSO GB. Three GB drafters meant that we must have cut each other off pretty hard. My first pick was Ishkanah, Grafwidow. I was seeing some very late Drag Unders and maybe should have took that as a sign to go into blue. I was seeing decent GB stuff so I stayed, but in hindsight I maybe should have switched. No Murders and no Boon of Emrakul seemed to really hurt this deck.

Match 1 against UW splashing tamio, field researcher (2-1)

Game 1 I was able to chip away with a Thraben Foulbloods for the win while my opponent stumbled on mana.

Game 2 I got wrecked by flyers such as aberrant reasearcher and Wretched Gryff

Game 3 my opponent stumbled on colors and I was able to just chip away for the win.

Match 2 against UR Sprits (1-2)

Game 1 I got severely mana flooded and to add insult to injury, I drew Call the Bloodline right before I died. I could have used that earlier...

Game 2 I was able to punish my opponent's slow start and finish him off with the help of Wolfkin Bond.

Game 3 my opponent had a really great start and quickly dispatched me with Niblis of Frost and Mercurial Geists.

Match 3 against WB (0-2)

Game 1 I kept and slow hand a castable Elusive Tormentor  ^Flip but got run over by Pale Rider of Trostad and Fiend Binder. Man I've lost a lot of games to Fiend Binder. It is so dang good.

Game 2 was agonizing. I mulliganed into a hand with swamps and stuff and even though my opponent had a slow start. It wasn't until about six draws later that I finally found a forest and by then it was too late. I was able to use Terrarion to cast a non-delirum iskanah, grafwidow and Prey Upon, but Angelic Purge took her down soon after. I was able to hold out and begin to stabilize, but I slowly fell behind on creatures and my opponent eventually turned on delirium to help finish me off.

Thoughts:

The more I play with Prey Upon the less impressed I am with it. So often your can't get a favorable fight AND there are a ton of good combat tricks to ruin your ideal fight anyway. It also is an extreme non-bo with creatures like Primal Druid (I recognize that you may want your Primal Druid to die, but removal shouldn't end up being best used on your own creatures) or your early defensive creatures. I think it might be best suited for aggressive decks that desperately want to clear blockers.

Elusive Tormentor  ^Flip has never really been that great for me. I can see how it would be good in a board stall, but it is still very costly to keep activating.

I actually sort of liked Vessel of Malignity. It adds an enchantment for delirium and can really mess up your opponent's plans.

I also liked Wolfkin Bond. You have to be careful when you cast it, but the boost together with the wolf token are very nice.

I ended up splashing for Anguished Unmaking, but never cast it. I think it was probably worth it and I really wanted to get some Warped Landscapes to ease splash, but they seemed to always show up in packs with important payoff cards for my deck so I didn't get any. I was fortunate to get a REALLY late Call the Bloodline, but it mostly just mocked me by showing up six turns after I wanted it.

I've tried Delirium decks a few times now and it is very hard to actually turn on delirum with any sort of speed or consistency. Even when you have stuff like crows of dark tiding, there is such a high chance that you don't hit what you need. I think that I should have been more careful when drafting/deckbuilding to get a lot of all the card types. It seems like you are forced to run some number of lower-quality artifact creatures to help get delirium online and I'm not sure if the fickle payoff is worth playing worse creatures to get more types. That being said, I do think this deck was OK at achieving delirium.