Living Hive out, Avacyn In

Archangel out

Just a small suggestion, have you thought about replacing Courser of Kruphix with Oracle of Mul Daya ?
I feel like the life gain isn't nearly as helpful as the extra land per turn.

Yeah Courser has already been cut. Like you said the small amount of life gain wasnt worth it in this format. Oracle of Mul Daya would be a great card in here I think. I should update the Description as well as I have moved away from having to be able to cheat everything in with Mayael. I am attempting to make the deck more competitive and be more interactive with other player's board state.

It That Betrays for Tooth and Nail entwine. Grabbing Ulamog and this card, is an easy scoop for your opponent to make.

Its funny but the real reason Ulamog is in the deck is use his recycle ability. It That Betrays and Ulamog would make a good combo but I added Restoration Angel and Kiki-Jiki, Mirror Breaker are in there for targets with Tooth and Nail . I do enjoy the Eldrazi though and if I end up with more, some may make it into this deck.

I don't want to sound like I'm throwing out 'staple' cards but Mimic Vat may be great in this deck. If you don't decide to go with the Vat, then I sincerely suggest Teferi's Puzzle Box . It may seem detrimental at first, but it really lets you dig through the deck for several turns to grab out components faster. Plus it really kills an opponents strategy since they won't be able to keep up with the puzzle box most of the time.

Since you pump out creatures, no reason not to see more options during a game. The other card I wanted to suggest also was Mana Reflection and Sylvan Library . Even though they are expensive, they will really help you play your hand, and see what's coming up for Mayael's ability.

I like the idea of Mimic Vat I could "save" a creature by making tokens of it, say Resto Angel so I can play KiKi and still have the combo win. Teferi's Puzzle Box although its going to draw me new hands and keep the opponents off a solid strategy it also kinda hurts me. I tend not to play a lot out of the hand and instead cheat creatures into play via Lurking Predators or Mayael, as such this is where Scroll Rack would serve me better by being able to put the creatures back on top of my library where I can cheat them out again.

I like Mana Reflection and might very well try that out. With some recent tuning I can now get up to a potential 11 mana on turn 4 and if I cast this I could then follow it up with most of the deck. A Mana Reflection into a Vorinclex, Voice of Hunger is my new hope. Turn 4 if you played first would likely lock most people out of the game from there on.

This is pretty sweet. Have you though about Beastcaller Savant instead of the Satr? Works good for me. What do you do if you Mayael your combo pieces to the bottom of the library? Or are they not that big of a deal?

I have my own list I'm always looking to improve: The Safari Zone {Primer}

I think you mean Voyaging Satyr the Beastcaller can't untap any of the lands that produce extra Mana and can only cast creatures. I try not to cast creatures when I can with this deck.

I totally get that. I guess Beastcaller works for me as I don't run any mana doublers, otherwise, Satyr may be worth it. Do you often get both out on the battlefield at the same time? Beastcaller helps me easily cast any 5-6cmc creature by turn 3.