Longevity Cards maintain value in both play and collection
Sure, it forces your opponents to do the same, potentially refilling their hand with more spells, but also has tons of potential of shuffling away some powerful spell they were holding on to
If you can get your heavy-hitters like Mufasa, King of the Pride Lands and Simba, Returned King out fast enough, you can overwhelm your opponent with sheer size and win the game before they even have enough ink in their own well to deal with you
Now get out there, start your card collection, build fierce decks, and battle for bragging rights!
Not because they lack good cheap cards but because their cards tend to be very one dimensional, they do one thing well but are dead weight when you don't need to be doing that thing
Plus, they can also be used as a desk mat or mouse pad