It's mass removal tethered to a recursion spell
For the aforementioned eight mana, you get an 8/8 flying vigilance Angel that is both indestructible and also provides that same indestructibility to every permanent you control
What if I Milled More Nonland Cards Than I Have Rad Counters
Jace could see the resemblance
These three planeswalkers aren't particularly innovative, they just expand upon changes we'd already made: other versions of existing characters, narrower thematic focuses, etc
If you have ten bullets in your deck, even if youre playing 70 cards and viewing them all as bonus slots that dont take away from your other cards, youre still one-seventh bullets, meaning an opening hand will have an average of one bullet, which is like taking a mulligan every game if you assume bullets are narrow and not worth a card in the wrong place