skoogle

Seems busted...

Cut your sideboard down to 15 cards. As it sits, it's not legal in tournament play unless your local shop has strange rules.

I would start by drawing up some ideas for a sideboard, mostly to deal with other decks in your particular metagame. I might also consider taking out some of the basic lands in favor of Blood Crypts and possibly Rakdos Guildgates.

I noticed you discussed Primeval Titan in the description, but it doesn't appear in the decklist. Is there a reason for this?

Remind me to board Zombie Apocalypse against this. Pretty awesome. But Salty mentioned Angel of Glory's Rise. While a little pricey, the angel could be a devastating option in your sideboard against zombie decks, like mine.

I might add both Propaganda and Ghostly Prison. Both require your opponents to pay 2 mana for each creature that attacks you, so if you get them both out, your opponents are paying 4 mana per attacking creature.

Another thing I might do in your position is run Lingering Souls. With a Sublime Archangel on board, you make yourself 4 Exalted triggers with one card. And even if you don't have the Sublime out, you still make 4 dudes with one card. Those guys can swing in the air, and they can block, buying you the time you need to find your Crusaders or your Knights or whatever you need.

Perhaps add a splash of black via dual lands? I see Swamps, but their sole purpose appears to be for Forbidden Alchemy. If you used Woodland Cemeteries and perhaps a Drowned Catacomb or two, you'd still get that black, and you'd have that much more green and blue, respectively.

Would Killing Wave benefit this deck? Sacrifice all of your dudes, gain some life from Blood Artist, get your Messengers back with Undying...

I see you added a Swamp. Since we're trying to stay budget friendly, I might add a couple of Evolving Wilds. That way, you can go find the Swamp when you need it.

Maybe take two each of your basic lands and replace them with Isolated Chapels, if you can get 4 of them.

The problem with that idea is that the Metamorph copies the Hydra, but not the counters on said Hydra. The Metamorph would enter as a 0/0 and proceed directly to the grave...

I like it. But you may wish to consider cutting two each of your basics for Sulfur Falls. Also, I'd like to ask how Rewind might work in this deck.

Maybe 4 Raise the Alarm and 3 Gather the Townsfolk instead, because instants are better? The same logic does NOT apply to Lingering Souls vs Midnight Haunting, though.

What if you added some dual lands to help with your colors? I think the black aspect of the deck would benefit from a couple of Drowned Catacombs and Woodland Cemeteries. I also think that 4 Boneyard Wurm would be better than two, despite the lack of trample.

Entomb and Exhume/Animate Dead are staples, and Faithless Looting is another important card there. You might even want Dark Ritual if you want to try for a turn 1 Titan.

Lingering Souls in SB rather than main? Interesting. I might run it mainboard because with a Sublime on the board, you're making 4 Exalted triggers with one card. And even if you're missing the Sublime, you still get 4 fliers for one card. They can use those Exalted triggers, and they could prove to be the blockers you need to survive. I might also look for Ajani, Caller of the Pride for this deck, and I might move Knight of Glory to mainboard.

Why no Hinterland Harbor in your lands?

I like it. Though I might suggest running Lingering Souls. It makes you 4 Exalted triggers from one card if you have Sublime Archangel on the board. And even if you don't, making 4 creatures from one card is still really good. They could be the extra blockers you needed to survive. If you like the deck as-is, then swap the Mirran Crusaders for Lingering Souls when rotation hits.

This deck could use an Angel of Despair. Drop it on the battlefield with Kaalia's trigger, and you can destroy any one thing you want, including a blocker. You could also use both versions of Akroma. Lots of keywords, and "firebreathing" on Akroma, Angel of Fury. I might also include some more card drawing stuff, like Promise of Power.