"At the end of every mythos phase after the first, move 1 doom token from this card to the terror track and increase the terror track by 1. Any player may exhaust a ready exhibit item or discard a unique item to negate both effects."
So, if you don't burn an item, the number of tokens on the card goes down; otherwise it stays the same. All you can do is delay the inevitable. So you can't ever pass! Is that really the intent?
Also, after 5 turns of not spending an item (possibly interspersed with other turns where you do), you have a terror level of +5, and 5 doom tokens on the terror track. So does the terror level then go up by another 5, a total of 10 caused by this card?
Ouch!