Barrowgoyf has a lot of value and stats on a cheap and easy to cast body. Lifelink makes it hard to race, deathtouch means it always trades, and drawing a milled creature gives it a nice value avenue. Shriekmaw has always been serviceable, but something had to give. Terror can actually miss a fair number of cards, even one stapled onto a body.

Crabaomination offers a nice bit of value from a decently sized creature. It’ll usually hit something relevant worth casting, and even if it doesn’t, it still nabs a card from their hand. A few years ago we were begging for something like Ravenous Chupacabra, but I think there is now enough other good midrange black cards that we can actually let go of it now. My other consideration here was Necron Deathmark, but the bigger body plus flash made me want to keep it more.

Sawhorn Nemesis can represent a lot of damage real quick. Doubling all of the burn spells gives you a really good shot to win if you untap, assuming you didn’t win my doubling up your Lions, Pikers and Bears already. Shrine of Burning Rage has been a little to slow for cube for a while now, but I’ve always liked the card. It pains me a bit to cut this one.

Pyrogoyf does a really good FTK impression, and by always being able to go to the face, means you can play it on an empty board. Hazoret has been a good finisher, but was always awkward whenever you were stumbling, so it’s a pretty easy one to cut for something that’s better when you’re behind.

The last change isn’t much, Bloodbraid Challenger for Bloodbraid Elf, but being able to recast the Challenger after trading away or getting wrathed is a nice enough bonus to justify a one mana increase.