Huh... I think this is really a possibility for Oath. Especially a grindy, control oriented Oath build (OathStill anyone?). Notice that unlike JVP or Snapcaster, you don't even have call your shot ahead of time. You can cast counters out of your yard in a counter war... Oath into this dumping Mana Drain into your yard and then just cast something and dare your opponent to start a fight? Not to mention passing Dig, Cruise, Ancestral, Demonic, or Time Walk... oh god, the Time Walks!
Still not sure it's better than a Gris... but you can really cast this. And Oath runs a ton of 5 color lands as we know, so the colors don't seem too hard. Annnnnnd this lady pitches to Force? (Crap, did I just assume a gender again...? Lemme stare at the folds of that robe and make sure this isn't the Olivia situation all over.) This could be good!
(This is better than Greenwarden. It flies over tokens. It's more castable. It pitches to Force.)