I am holding off on Chandra for now due partly to the mana cost. It seems that it is mostly her +2 that is any good. A "sweeper" that deals 3 damage doesn't do a lot and targeted damage is fine, but it can't it a player. Her +2 might be good enough to include, but 6 mana makes that tough.
Lotus Field entering tapped kind of throws off the curve a bit in the early game and almost doesn't matter in the late game. And, arguably, the Hexproof keyword is almost irrelevant since I should have much better targets for lands to blow up than "just" a
Black Lotus, I don't see it having an extreme impact when I want it to though it does tie into Windgrace quite nicely. Without Windgrace though, it is a worse bounce land.
I had considered Field of the Dead based on other discussions around it. So far, I have held off mostly on the basis of it only producing colorless mana. With that being said, I can see where it would be insanely powerful in this deck. I should probably pick one up and give it a try. I might wait a little bit since the price is still kind of high for some reason (I would have expected it to drop off after being banned).
Syr Konrad just seems like he does so little. Maybe I am underestimating how many things actually hit the graveyard from different zones and maybe, with a couple of the "army in a can" cards talked about earlier, he becomes that much better.
When I saw Springbloom Druid spoiled, this was the deck I though of including it in. It is a
Harrow on a stick and does work to ramp as well as mana fix (if needed) and other cards in the deck can get the sacrificed land back. I think it could be a fine ramp option at the 3 drop slot and, for the list I have, arguably makes more sense than
Yavimaya Elder now that I cut Borborygmos. I might try making that swap.
Garruk was one of the Walkers I considered when discussing adding more walkers due mostly to being a pain to deal with on Arena. I think for a curve topper, he can be very good. I am mostly interested in his ability to spit out blockers to begin with which then fuel his ultimate. And, since it is an Emblem, it can stack over the course of a few turns. I like him. At the very least, I like him more than Chandra, but that is more of a personal playstyle preference than one being objectively better than the other.
I actually agree with you on Soul of New Phyrexia. It is really just a hold over for when my group was super into MLD and I haven't wanted to cut it yet due to the fear of not having an answer to that (beyond the
Heroic Intervention in the deck). In the last game, it was scary enough for someone that they did actively try to get it out of my graveyard. But, when that happened, I couldn't have cared less about it. It was just "filler" at that stage of the game. I think the time has likely come where that card gets the "axe" (perhaps Garruk's).
Lifeblood Hydra is very good when I need it to be. I have 4 sac outlets in the deck and the deck is built around getting all of them (as well as every other land) onto the battlefield. I like my sac outlets and very often, my
Realms Uncharted gets me 2 or 3 sac outlets to be absolutely sure I have one. I can't remember the last game I played where I had the Hydra and didn't have a way to sac it. I could see discussing the card based on other things, but "not having a sac outlet" is not a concern.
I hate bounce lands. I had kept one or two in the deck for Borborygmos for a little while but even that wasn't worth the tempo loss so I cut them. I am not as concerned about them getting blown up in this deck but I just don't think they are worth a spot in the deck over anything else already here. And I am not sure what deck I *would* actually put them in. They don't ramp and are more vulnerable to land hate. I get they make sure you have a land drop later so you don't miss land drops, but i haven't often felt that to be of any real concern.