Toxrill, the Corrosive is a notable exception, only reprinted in a Secret Lair
Also of course, Intruder Alarm, which you know, every time a new set comes out there's a card that combos with Intruder Alarm, so kind of boring
Play Boosters are also a flexible pick if you want something built for actual tabletop play rather than purely collector-chasing for high, though there are still plenty of valuable cards listed on TCGplayer that you can pull
The best aspect of Reckless Endeavor is that you can choose the value of the die to deal damage and to create Treasures
Two-Headed Coin The first time you flip one or more coins each turn, those coins come up heads and you win those flips
The value of Den of the Bugbear fell slightly heading into fall rotation with a classic Showcase foil module valued at around $13