ClockworkCopper

You seem to be missing two cards to make this a sixty card deck, may I suggest two Mind Stones? Can give you that additional mana boost, card draw if not needed or used to enchant Ensoul Artifact with. Plus, they are pretty affordable over Mox Opals.

I would say Relic of Progenitus would be a nice addition to sideboard for graveyard hate and some draw over Rest in Peace. Would help out with Mox Opal or Etched Champion's metalcraft and also Court Homunculus or Cranial Plating.

For possibly maindeck, Myrsmith comes to mind to free up extra mana to play 1/1 myrs. Also, Hangarback Walker would be great with a Steel Overseer or two in play to beef up.

How about running Rhonas the Indomitable, seems like a good choice. Being that when Ghalta, Primal Hunger comes into play Rhonas the Indomitable goes live as well.

Amulet of Vigor would be a nice addition so, your permanents come into play untapped.

Urborg, Tomb of Yawgmoth would be a great addition to this deck running Funeral Charm. Giving Master swampwalk and making him unblockable in the process if on the battlefield. The main issue is maybe adding protection in your sideboard from removal and shutting down your main combo piece Master of Cruelties. Best suggestion I could give would add Apostle's Blessing giving him protection from targeting. Also, Anger maybe an option getting it into the graveyard by discarding giving Master of Cruelties haste if a mountain is in play.

Blood Moon would be a great choice with the new change in the Blood Moon and Magus of the Moon ruling. Dark Depths would come into play with zero counters on it but, would still become a mountain. Then when Blood Moon or Magus of the Moon leaves play Dark Depths triggers and becomes a 20/20 flying badass token of death. For removal I would run Lightning Bolts to toast your Magus of the Moon or possibly Crack the Earth for Blood Moon. You could use this as a back-up in case combo does hit the table plus, Blood Moon is great in stalling the game for the combos to go off.

Deck looks great, I built a deck like this years ago but I ran Kaervek's Spite and Academy Rector.

Being that it is Captain Planet I'm surprised you didn't add the Planeteers rings?

Ring of Kalonia = Earth
Ring of Thune = Wind
Ring of Valkas = Fire
Ring of Evos Isle = Water
Ring of Xathrid = Heart.... well, Black Heart

Deck looks fun to play theme decks are always great!

Also, Mishra's Bauble would be another great choice and Lotus Petal well, only one being Vintage.

My bad Street Wrath's cycling is an active ability so doesn't count as casting a spell to trigger Erayo. So, not really needed unless wanted a little card advantage but, the deck is pretty well built around that.

Being more of a vintage deck you could add one Gitaxian Probe for triggering Erayo. Also, possible with a splash of black you could go with Street Wrath and Surgical Extraction for drawing and exiling there combo pieces or removal.

Judge's Familiar would be a nice addition you could sacrifice it to stall your opponents removal spells if needed.

Faithless Looting would be a great addition being that you can either discard Ulamog then shuffling your graveyard into your deck if he is in your hand. Also, discarding any additional lands being that your highest casting spell if three so hopefully drawing more burn spells. Most mill decks run graveyard hate in the sideboard, even main deck such as Leyline of the Void, meaning Ulamog would not trigger the shuffle and would be removed from the game. So, being that you may want to research into enchantment hate and removal which could mean splashing in white or green spells in your sideboard. The other way is stalling mana production so being that you are mono red Blood Moon would be ideal.

I'm surprised you're not running Anowon, the Ruin Sage, being that most of your creatures are vampires.

I would maybe go with Gather the Townsfolk over Servo Exhibition, just because of the possible additional tokens incase you are at five or less life. I was playing around Muraganda Petroglyphs a couple of day ago and mostly been thinking of a mono-green deck with a splash of devotion. Mostly the creatures that come to mind are Kalonian Tusker and Leatherback Baloth. I know Nissa, Voice of Zendikar is pretty solid and added her to the deck mostly based around plant tribal I did. The deck looks pretty well put together, I was thinking maybe you should add Watchwolf but, don't know if it would fit the theme with token production plus, not really sure if anything should be taken out to replace it.

I like the idea I thought about toying around with the standard combo and turning it into a modern deck rotating around somewhat Splinter Twinish feel. I hope you don't mind if I go off on this idea and put a deck somewhat like this together. Also Kiki-Jiki works great with Felidar Guardian giving you unlimited cats as well. Hope the deck plays out for you and best of luck.

Blossoming Defense seems pretty solid, great against removal spells plus give your creature +2/+2 for added bonus.

Cyclonic Rift is great, the overload is seven mana so expensive to cast that but, if in a bind could bounce one creature for two. I always like Remands bounce a spell plus get a draw. Cryptic Command is great, two choices tap all there creatures, bounce a creature, draw a card, or counter spell. The downfall would be the price tag about thirty five dollars per card but, very solid. You could even go with maybe a wall like Fog Bank all damage it prevented and only a two drop as well.

The only thing with Path to Exile is the (may) in it so if they choose not too search they don't have to but, still in your favor for not being able to play additional land if they know whats coming. I think Ghost Quarters would work just as well, it would act like a Strip Mine in modern if they know you are holding a Archive Trap.

I will have to check out your other decks to get some ideas, it's fun to put together beginner decks, I ended up putting two decks together because, my neighbor wanted to learn how to play. I put the links at the bottom if you wish to check them out, they're just simple decks with one effect per card so makes it easier to learn.

http://www.mtgvault.com/clockworkcopper/decks/duel-deck-the-beginner-1-of-2/
http://www.mtgvault.com/clockworkcopper/decks/duel-deck-the-beginner-2-of-2/