Assuming this is not block, I'd advise tweaking it a little, either to focus on the Ultimatums (thus packing Fertile Ground and Garruk Wildspeaker instead of Sarkhan Vol) or focus on the beatdown, do not try to do both. From what I can see it, this is either a weaker Jund Ramp deck or a much weaker Blightning deck. I like 1 Banefire maindecked, perhaps over 1 Maelstrom Pulse (seems overkill, with it not being able to kill lands). Also, I kinda miss the other Thrinax, and some devour sources, maybe over those Cyclops? I actually think Blightning is kind of "meh" in this build, kinda "too far out there", I'd switch it for either targeted burn or Volcanic Fallout. I'm not very fond of the Lieges, as well, you could consider running Broodmate Dragon or Spellbreaker Behemoth (uncounterable), go for a quicker game. I'd also pack Loxodon Warhammer, and possibly move the Ultimatums to the sideboard (or lose them altogether), alongside Vexing Shusher to force it through and lose a Hemorrhage and the Lashers (they're not that great in this build, to be entirely honest) for that RB enchantment that prevents lifegaining at all, and maybe Volcanic Fallout (if not maindeck) and Chameleon Colossus, to force through against token decks.