Added Ruin processor because it has unique interactions with adventure cards. I am worried it may supplant Greater Sandwurm but because it cant cycle and it can be chump blocked, I feel like its safe to add

Ironhoof Boar is similar to Sprinting Warbrute but has additional versatility. Dash isn't too useful in this cube.

Ecologist's Terrarium gets a land immediately, sacs itself later and adds another source of +1/+1 counters, which I think will be an interesting mechanic to add.

Maned Seval Wasn't too interesting. Era of Enlightenment adds the only source of first strike in the cube.The scry and the heal effects are welcome as well.

Befuddle wasn't used a lot, so Anticipate is added instead to add a second blue card draw.
Ephara's radiance stalled games and only comboed with Regal Bloodlord. Pious Interdiction added to add an additional whitr control card that gains you life too. Act of Treason added to add value to Blazing Hellhound and Rimeshield Frost Giant.
Hammerhand was a holdover from a version when enchantments were more valuable. Added Dragon fodder to promote WR aggro

Thought I already updated this but apparently not. While Ledev Champrion is nice and helps go wide, I wanted to another payoff for life gain. Trelasarra, Moon Dancer is that payoff. It can be an early threat and will help smooth out draws for decks that don't manage to grab blue.

With so many high end threats, Accomplished Automaton was often skipped or not selected as a viable option. I think Terrarion will be more interesting because it can be a way to fix mana and pairs well with the sacrifice theme.
Sparing Construct is an artifact that also pairs with the sacrifice theme so I'm worried there may be too many artifacts supporting that theme. I'm going to play Terrarion and see how it does, but it may be replaced down the road (perhaps for something that supports burn or control)

Bone Splinters to better play into sacrifice theme.
Memory Leak was barely played.
Mana Cylix was avoided, replaced with sparring construct to promote aggro and support sacrifice.
Skygate to skyskiff to give Tezzert's Touch an interesting target
Fire Elemental Not interesting compared to other threats in this cube. Replaced. Bathe in Dragonfire out classed y Flame slash. Hopefully this will support aggressive play.