Both are playable, but Fated Return is really exciting to think about, to work with, to explore, while Pain Seer is just this guy that might go in some black aggro deck (but very likely wont and is just plain overrated due to his resemble to his far more charming cousin Bob)
The set has been out of print for over two years, and the 2026 Pokemon 30th anniversary has pulled renewed attention toward Kanto-focused releases like this one
Issue is, all of these printings were US-only, with even the European release of Dawn of Destiny replacing Ra with a different promo card, Mesmeric Control
Beza, the Bounding Spring I wasnt sure about this Bloomburrow card until I read it a few times
if I came across one in real life I would give up on thoughts of fighting them as I know it'll be fruitless