Rampaging Baloths making more beasts as we open more gates is thematic, and can help give us a potential alternate way to close out a game if we can drop them on curve and follow them with some late ramp
Her other variants, Clumsy Guest and Contented Wallflower, are both Emerald cards as well, making her a good option in any deck combination you choose
Thankfully no Horsemanship on Rohan cards, AFAIK
Combine that with Kraum, Ludevic's OpusKraum, Ludevic's Opus for a fast-flying threat in the air that will also draw you more cards, and you get the leaders of Blue Farm, the cEDH deck that has ruled the meta for several years now
Auras are usually a little fiddly to play with, but given this one can come back of its own accord, its probably better than youd think
Even something as simple as a mana rock will cost you the game if your opponent just instantly steals it while also making Dack