Rob, I am so happy you exist. This cuesbey stuff is really coming along. I made a complete In- and Out- list from six weeks of changes for an upcoming article (coming out in the next 48h sometime), and your site was a massive time saver.
It's really great that you can bookmark a list for a comparison now. Looking forward to watching this one evolve!
Here's my favorite gem (Though more narrow than you might be looking for):
Zombies Drafter: Come on. Throw it back at me. I dare you.
Maybe it's not so bad at 360, but I've always wanted more discard available for black, since it's the color's main form of interaction other than removal.
You were looking at ways to tie your blue section to the sacrifice/pod themes, so I suggest lots of clones: the interaction with undying/persist creatures is second to none, and they also help you jump up the pod chain (Though only if such a creature is already in play)
I'm currently testing Wakedancer as a pod/zombies card (But sadly I haven't gotten any games in with it yet)
Depending on how amenable you are to proxies, Shadowborn Demon looks promising, from the M14 spoiler.
Krenko, Mob Boss is a card that has been preforming admirably for me: Feeding Eldrazi Monument, Providing Red decks with inevitability, and being generally a better curve topper than I expected him to. Shoutout to Kranny for the suggestion on him.
Pyreheart Wolf performed well for me before I added the pods, he's been excellent afterwards.
Voice of Resurgence is in for Gattock Teeg as soon as I get my hands on a copy.
I'll give Krenko a test. My only real experience with him is in a Minimasters tournament, so that hardly qualifies as good experience. Most of Kranny's finds are a little light on power level for my cube, although they are good discoveries. That is perhaps one of the benefits of running a lower powered list.
I do like Oversold Cemetery. Despite the Gravecrawlers though, I don't really have much of a graveyard theme at the moment. It's an area I plan to explore, and I always love these techy suggestions.
Shadowborn Demon is an interesting curve-topper. I like that it's synergistic, and not just brute force. I'll hold out for a real copy though.
Wakedancer is pretty sweet. I have it lined up for my next cube project, and is currently competing with Pawn of Ulamog. I'll give it a test!
I could see hell's thunder for Pyreheart wolf. I've never been a huge fan of hell's thunder, since it's not really a creature (mostly a sorcery, I put keldon marauders and hellspark elemental in there too)
As a spell it seems fine, mostly being pulse of the forge with flashback, but it probably shouldn't be counted as a creature in the same way maze of ith doesn't really count as a land in your deck.
i love pyreheart wolf, i think it's worth a try. it's just a good card
countryside crusher, cunning sparkmage, staggershock, sulfuric vortex, seismic assault round out my red 3's (excluding a big gold section). crusher is all kinds of fun but can be frustrating when you need to hit another land drop and cannot. sparkmage is sweet, cube should have at least one pinger effect!
i dislike hell's thunder, not sure what to think of vandal / phoenix / tuktuk. how have they been playing?
Really surprised you guys don't like Hell's Thunder. He's everything I want in a red aggro deck, and works amazingly with sacrifice effects. It's pretty much a perfect fit, mechanically speaking. These sorts of effects are perfect in the Carrion Feeder / Goblin Bombardment / Blood Artist decks.
Tuktuk has been nothing short of awesome, and has dozens of fun interactions to boot. In the right deck, here's his common lines:
The turn you cast him: swing for 1 damage
The next turn: swing for 1 damage, turn him into a 5/5
The turn you cast him: swing for 1 damage, turn into a 5/5
Nobody blocks him, so you get free haste damage, then you set up your plays to profitably get a 5/5 (e.g. Innocent Blood, Fleshbag Marauger, Birthing Pod, Cabal Therapy).
Plow Under is definitely the objectively stronger card. Just need to see how Primal Command fares, especially with all these Gravecrawlers running around. Half a Plow Under + tutor a creature isn't too shabby either.