Always scrutinize them and research their current market value before listing them
FromTheShire: This is one of those great cards that doesn't seem QUITE threatening enough to demand immediate spot removal for a lot of players, but will snowball very quickly if left on the table
Lurrus of the Dream-Den Lurrus of the Dream-Den, utilizing a hybrid (W/B)(W/B) cost, redefined competitive Magic upon its release in Ikoria: Lair of Behemoths
If you can't win with that working for you, you need to work on your deck design
The Warhammer 40k decks have powerful sagas too, some of which already see substantial play with Tom Bombadil
There will be one obvious marquee mythic rare in the $30-$40 range like Voice of Resurgence, one (maybe two) other marquee mythics in the $15-$20 range like Blood Baron of Vizkopa, a mediocre planeswalker like Ral Zarek, and a couple of mid-value rares in the $3-$5 range