Consecrated Sphinx may be worth consideration. Does your deck run well with so few lands? I usually end up with 35-40 lands in my EDH decks, depending on the colors. Otherwise, looks like a fun deck. +1

Sphinx sounds really good, I'll look into picking one up.

As for lands, as long as I have 2 lands and draw or land ramp in my opening hand, I never have problems keeping a fast pace.

Looks good, +1. Cultivate and Kodama's Reach are generally superior to Harrow . You might like Tidings and Recurring Insight . There is also Sylvan Primordial which is very solid, along with Molten Primordial . Maybe maybe Gruul Ragebeast . Dragon Broodmother activates on each players turn if you're playing multiplayer. I like that you're playing isocron scepter. Peace.

Updated. Sturmgeist wasn't really doing it for me, dropped him and Realms Uncharted for Melek and Progenitor. Very pleased with how they're working out so far.

As for Harrow vs Cultivate/Kodama's, I like having the ability to copy harrow and ramp +3 lands all at once, because I usually draw enough that making a land drop almost every turn isn't a problem. The fact that they're untapped also allows for more shenanigans on the same turn.

Recurring Insight seems awesome.

FINALLY got my hands on a Consecrated Sphinx . Curiosity was really only there for the infinite combo, and Polymorph wasn't really doing much work, so I dropped them for Sphinx and Sakashima's Student , because I love clones. Naturally adding a ninjaclone was the next step. Forget the new rules, you keep your legendary and I'll just make 5 Psychosis Crawlers. Bam.

Your land-base could certainly use some work.

Sulfur Falls , Rootbound Crag , Hinterland Harbor , Misty Rainforest , Scalding Tarn , etc...

All the buddy lands you mentioned ARE in my deck. This deck is more oriented towards basic lands due to the type of ramp spells I have. Boundless Realms for 10 is useless when you only have 5 basic lands left in your library.

You really need a higher land count. 32 lands means that your curve doesn't really go above 2-3 cmc. I think you want about 39-40.