(Until there are enough options for a high-density of solid sacrifice outlets in Temur colors, I wouldnt go all in on that plan, but the one-off is a nice option that synergizes with the rest of the deck.) There are a lot of creatures with great abilities for +1/+1 counters, and we also just want back-up options in case casting our commander becomes difficult
Let me try to explain
On top of that, creature sources of mana are extra helpful with Herigast, since they can be sacrificed towards those emerge costs
In a multiplayer game, each opponent in turn order makes their choice once, then all of the actions occur simultaneously
Playing this on turn 4 with A Whole New World almost certainly sets you up with a range of songs to sing on the next turn
Hosts of Mordor Saurons very own deck is still pricey , but its very fun to play with the caveat that Sauron is an 8-cost Commander which might make you want to swap him with another version of The Dark Lord