No Taniwha ? He is amazing with Zedruu.

Ooo, nice one. Propaganda + Taniwha for excellent pillowforting XD

This is looks like a perfect deck to make Goblin Cadets useful.

So when you hear phasing out, does that mean it stays exiled until the end step or it exiles itself and then comes straight back in?

And Ghostly Prison ? Or did you leave that out on purpose?

 I believe cards with phasing leave/enter on the untap step; e.g. with Taniwha
 the lands would phase out on upkeep and re-enter on the player's next untap step, only to be immediately phased again in the following upkeep.

Ghostly Prison should probably be in, I put Propaganda because it's $2 vs. $4. I'm slowly upgrading as I feel like spending money. e.g. Hallowed Fountain and Sacred Foundry to complement Endless Horizons . Suggestions for what to take out? I'm also considering Forced Fruition for possible mill/hug, Oblation for more control/hug, and Sacred Mesa to combo with Vicious Shadows . Was thinking of removing Darksteel Ingot , Political Trickery , and Journeyer's Kite .

What combos are you talking about in your description?

Well there are quite a few with Opalescence, for instance, Mirrorweave + Opalescence can give me six Forced Fruitions...in response to a spell. Another strange one is to give Form of the Dragon, then take it back with Brand before my next upkeep. There are also more basic ones that kill through drawing, such as Psychosis Crawler and Niv-Mizzet, and either Zedruu or Mindmoil. Hive Mind + Prosperity is good for milling, make everyone draw 40 cards.

Good deck. +1

I like it. This is looking very similar to my Zedruu deck, though mine I went for a more chaotic approach because I liked the table politics my group went through. Have you considered Crown of Doom ? Nets you more card draw and encourages enemies to attack one another instead of you.

Ha, I do like it for the politics. Might take out Strionic Resonator , I've found it to be more trouble than it's worth.