Larger Than Life: Larger Than Life is a strictly better version of Predator's Strike, giving you an extra point of Infect damage and Evasion with Trample. It's the love child of Predator's Strike and Phytoburst, and thus fits perfectly within the deck
Slip Through Space: At first glance Slip Through Space looks like a strictly worse Distortion Strike, but after testing I found that most of the time an opponent will be more likely to prioritize removal on our board if they know we can attack for unblockable damage again with the Rebound trigger. Slip Through Space also makes our creatures unblockable while also digging through our deck, and if we draw another pump spell or Infect creature the +1/+0 bonus Distortion Strike gives us may not even matter.
Brainstorm: This is a recent addition, as I wasn't impressed with Gitaxian Probe as a cantrip in the deck. Gitaxian Probe is often never cast for free, as we usually have unused Blue mana to spend and the free information is usually not even necessary. Pauper is such a removal heavy that removal can almost be assumed, and there's not much Instant speed removal that can circumvent a pump spell or be dealt with a Vines or Apostle's Blessing. You'll also most likely have multiple Infect creatures in play at one time, which effectively makes targeted removal worse. Since Gitaxian Probe often isn't cast for 2 life, and the information and card draw is minimal at best I found Brainstorm to be the better option. While there are no shuffle effects, Brainstorm is used as an Instant speed method of finding what we need when we need it. Whether we need another creature after our opponent's removal has been used, a protection spell to keep creatures safe, the Mutagenic Growth we need for lethal, or even the land to curve out or activate Groundswell, Brainstorm gives the deck much needed versatility.
