Its premium Phyrexia: All Will Be One printing is worth around $75, and while Sephiroth, the Savior was at one point more expensive than that, it's settled down to a much more reasonable sub-$50 price
Aesi, Tyrant of Gyre Strait is a big beast that would cost you around $10 on its own, while Giggling Skitterspike and Ashaya, Soul of the Wild arent far behind
Checklist Primary win method: Combat, combo, burn, drain, lock, inevitability
Then we have Deep-Cavern Bat, a card that I man, this was not meant to be a testament to design decisions, I didnt mean to make this a magic design article, I was just going to tell some jokes about bats and be spooooky about it but hey, this card represents an amazing wording change, because it introduced a new use of the word until in magic language
However, effects based on any additional costs that were paid for the original spell are copied as though those same costs were paid for the copy too