I just played an Aetherdrift quick draft game and I had Lightweight Enchantments in my graveyard with Max speed (4), but I couldn't cast it from my graveyard. I'm new to MTG Arena so I'm not sure if I just don't know how to activate such effects, but I clicked on my graveyard and the card itself and I wasn't given an option to cast it. Is that a bug or am I missing something? Thanks!