mtg mentor cards of the Meek Core Set 2019 Prerelease | Magic Menace Whenever Splinter or another nontoken creature you control leaves the battlefield MTGNexus - Ezio, The Mentor

Even if you just have a few mana sources up after casting it you can now tap them for triple mana to essentially give you another turn

OG Strixhaven introduced Lesson cards as part of its academic theme

You can opt not to block with defender creatures the same as any other

Still, I like the dragons in the frame of the alternate art version of this, so it's worth keeping just for that

Yet Another Aether Vortex and Zzzyxass Abyss are kind of cool in theory, but does anyone really want to go to the trouble of building around them

I do think they want to slide back and forth through different expressions and play the one that suits their needs at that given time. Of course the Historic format was already unique to Arena as well, if technically playable with paper cards