Mavinda, Students’ Advocate is a bit of a throwback to Feather, the Redeemed. Both Birds (well, Birds, Angels, same thing), Mavinda will allow you to cast spells that target your creatures, and then cast them again later from our graveyard. Unlike Feather, you don’t get to use those cards again and again, but double casting your spells is still nice.
One of the other mechanics in Strixhaven is magecraft, so potentially casting a lot of pump spells can give you some added value in that department as well. As this deck’s getting brewed, I’ll definitely be on the lookout for those.