Hi! I think this is a really cool idea, and being a solid plainswalker deck with a combo finish seems pretty awesome in the current meta. Being able to just dump an eldrazi titan into play off Creativity or Nahiri seems really fun!
I did have some questions, because this is a deck I would be REALLY interested in building. What would you say is the most common way to win? Is it the plainswalkers taking over, or landing a Titan? Do you have any plans for a sideboard? Some silver bullet one of's like
Exquisite Archangel for really aggressive decks or
Demon of Dark Schemes for wide decks seems like a really unique build strategy. Finally, do you ever use Creativity on your opponents stuff? and if so, have they been good experiences or bad?
As for the deck itself, the biggest problem I currently see (much like DelverMage) is the mana. However, I have a different alternative. The deck is pretty heavily White / Red with only a light splash for Black. the biggest black investment is
Flaying Tendrils with double black. So instead, why not try
Radiant Flames or
Kozilek's Return?
Radiant Flames can take out even bigger stuff, and is easier on the mana.
Kozilek's Return is an instant, so you can
catch them off guard, and while you're unlikely to ever actually CAST a big eldrazi, if you do, you get an extra sweeter, and it threatens your opponent and may keep them from overextending. You do lose the
exile clause, which is good against
Scrapheap Scrounger, but being able to more easily cast Creativity seems like a worthwhile trade.
Going with either dramatically lowers the dependence on black and means you could probably cut a couple
Shambling Vent and a
Concealed Courtyard for more red sources (to make sure you have triple red on T4), maybe just another
Mountain, an
Evolving Wilds, and a 4th
Smoldering Marsh.
Anyway, sweet deck and I hope this gives you some ideas! Good luck