As Tsareena is weak to Steel-type attacks , which arent as present in the meta as other types, Tsareena will have a lot of chances to deplete the HP of the biggest threats of your opponents deck until it gets defeated
There are other examples of classifications that are a little more niche, like ACE SPEC cards, Black Star Promos, and SSR cards
Like most Pokmon cards, the value of Beheeyem depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (BREAKthrough)
Combine with Sterling Grove and Ghostly Prison to set up an impenetrable defense that keeps you safe and sound while your opponents struggle to do much of anything
Since Stalkers printing, Wizards has been careful not to grant evasion to hexproof creatures
Once you know more or less what you can expect for your card, visit your local card shop and ask them what theyre willing to pay for it