Sultai Emissary and [[Bayou Groff]] have really good synergy. The Groff is a great manifest target and it can sac the emissary if you play it normally, but I don't quite see how I can make this work as a deck. It seems most people tend to want to abuse manifest by manifesting something huge and flickering it, but I feel that that line of play is a little bit too convoluted to be worth it, although it is nice that [[Soul Summons]] and [[Ephemerate]] are both white.
I think the trick to playing the Emissary is to have a decent volume of OK manifest targets in the deck, some sac value stuff and not overthinking it too much beyond that.
[[Scythe Tiger]] and [[Rogue Elephant]] are also good value manifest target, but their ETB effects are not so nice if you have them in hand. Perhaps in a sacrifice oriented deck they could be worthwhile if you just sac them as they ETB to trigger something like [[Mortician Beetle]]? Flipping a manifested Tiger in response to a removal spell is quite sexy, though.
