Cithiri

replace tormented soul with triton shorestalker maybe? Also, you don't have very many life gain cards, so blood baron seems useless here.

looks better now than it did before.

you don't have anything to keep master of cruelties from being blocked, which will make his effect nearly impossible to get. I'd suggest blinding flare.

I see a problem here. CMC for creatures is too high most of the time. You only have two 1 cost creatures, and you have a lot of creatures that cost 5 or more, if you play against a fast deck you're not going to like it. Also, almost all of your lands enter the battlefield tapped, meaning you will always be slightly behind in how much mana you can use. I'd take out both blood tyrants, two lands, one of Mirko, and one of Blood Chief. That would get card count down to 60 and reduce the amount of high cost creatures. Then trade out some lands that enter tapped for some basic ones. Also, while balustrade spy's effect is nice and goes well with Mirko Vosk, mind grind and all that, but I don't think you need four of him in there. Maybe trade two out for something that's one mana or something?

Since I got rid of prosperity for braingeyser, yes, it is a better fit for the deck now. I'll still sideboard conflagrate though, for large multiplayer matches so I can kill everyone at once.

Stuffy doll and use it's effect on yourself perhaps?

Thank you for the criticism. I'm definitely not a master at mtg, I'm still a big time novice, but I'm trying to improve my decks and get better. that's why I post my ideas on this site, so I can get advice and criticism. While it is true that this deck doesn't have much defense and it is just a race to get my combo cards out, it's still fun to play in a casual setting. Thanks for telling me everything that's wrong with the deck, that's a lot more helpful than people just saying "nice" or "good job" so no, I'm not going to downvote you.

I Love it!

NO! Don't die!

I would suggest a lot more constellation effects if you're going to run that many riptide chimeras.

erm... correct me if I'm wrong, but doesn't the commander need to be a legendary?

Hmm, interesting set up here, definitely has potential to be pretty good, but you have two different strategies that don't necessarily complement each other at play. One is to use Ob Nixilis' effect by forcing opponents to search their libraries with fertilid and maralen. The other is to destroy everything to power up lord of extinction. I'd focus on only one of those if I were you, having two strategies is fine, but they should benefit each other in some way. If you go for Ob Nixilis, I'd suggest putting in collective voyage (which would combo great with Ob Nixilis the fallen) ghost quarter, and any other cards you can find that will trigger his effect. If you go the lord of extinction option, then returned centaur, returned reveler, sewer nemesis, shared trauma, undercity informer, geth, and destroy the evidence. You should also put in some reanimation cards in case of self mill if you do the lord of extinction option, like vigor mortis, tempt with immortality, and victimize. Also, I'd lower the number of skullbriars you have, since he's a legendary, and maybe nix him altogether if you go with the Ob Nixilis option. Still, I've not seen this deck perform and don't know how good it really is, it might be great and my comment isn't worth beans, but I hope that I helped some!

Also, if you added in black, you could put in vampric dragon, bladewing the risen, and kokusho the evening star as well as other powerful black dragons.

THANKS! Love cathedral of war and emerge unscathed, great cards!

Thanks for the Gideon's avenger idea, but I want to keep some black in there so I can keep overlord, because his effect is pretty good.

Ah, good point on the color issue... still, having all your dragons deal direct damage equal to their huge attacks to a single, mortal, opponent, ouch.

Ever thought of putting in sarkhan the mad?

Yep. Turn two hunted horror, turn three use aphotic wings, tainted strike, and either boon of erebos or funeral charm. Looks nasty to deal with!

Nice, with aphotic wings in there it's now a turn three combo unless they get a black or artifact creature out there.

This combo is assuming that they won't have anything put out by turn 4, which is slightly unrealistic. I would suggest dragon shadow strongly. It would make it much easier to kill the opponent off without having to waste time or mana on killing the tokens you gave them or anything else that they've summoned (unless it's black or an artifact creature, then you've got a problem, but you can cover for that with wretched banquet easily.)