Skyclave Apparition is important not just for its overall power level, but for how it re-introduced this kind of creature-based interaction as a signature white mechanic
One nice thing I like about its card advantage ability is that it comes in attacking, not tapped and attacking, meaning if it has haste you can scoot it off once more after using it to chump block with
While that number may be small compared to what the grinders get through, its the most Magic Ive ever played in a given month even more than when I was actually on the Pro Tour
Teysa doubles these effects, turning every sacrifice into a game-winning play
Honest answer: very playable out of the box, but not optimized
This cycle of five cards is the second case of planeswalkers having a static ability (interestingly, listed at the bottom on these cards)