Lily and Hangar are obvious go-tos for the archetype, but I'm priced out of them (whereas I own the lands already).
The
Carrier Thrall is actually a very strong card here. The sac-able replacement body plays very well into this deck's strategy, and as a mana source, it helps to offset all of the the taplands. The mana ability may actually be more valuable than the manifest potential on the
Sultai Emissary, but that'll be seen in testing.