Sure, useful cards from this part of Magics history can and will spike in price, but Ive seen people worried about the supply of cards like Wall of Kelp
There were plenty of combinations, specifically with Enduring Renewal, also from Ice Age
As a midrange threat it is a bit one dimensional to be that exciting however it is so powerful that it does a pretty good impression of the seven mana threats
You even have the option of turning something of yours into a treasure too, which sometimes will be the right call If this were only the card on the front, it would be a 0.0
If youre looking for other, similar options, Necromantic Selection is a sneaky solution
You should only add this card if youre brave enough, but Eater of Days keeps Kardurs effect around for at least two turns