Exchanging a vanilla 2/2 face-down creature for a spell like Cyclonic Rift seems like a perfectly fair trade, right
Her innate protection is also invaluable
You can't destroy Stardust Dragon with a card effect, but you can Brian Control it and use it as a Synchro Material
However, depending on the deck, there are times when he can't produce Beerze, and there are cases where he can produce Beerze, and it's not like he can directly earn an advantage, but it's easy to maintain, and it's also possible to keep sucking her LP
I believe they were influenced by the Myrmidons from Greek mythology, so Brady called them Myrs
Furthermore, the format also represented the first time that the Thunder-type monsters were shown off in a competitive setting