Players of those commanders have an even bigger reason to get huffy and kill your Hippogriff
Remember how Dakmor Salvage and The Gitrog Monster terrorized Commander back in the day
It's decently popular with a good 220 decks over at EDHREC.com already
For example, if the top two cards of your library are Brainstorm and the modal double-faced card Valki, God of Lies // Tibalt, Cosmic Imposter, you will end up with a modal double-faced card that has Brainstorm as one of its faces, and either Valki, God of Lies or Tibalt, Cosmic Imposter as the other face, with either face as the front (your choice)
I think this card is an auto-include for most ally decks
Empress Galina Blue is famously bad at removing resolved permanents, which can include opposing commanders