I believe the card really should read “Exhaust this card during your turn to choose any number of your other exhausted skill cards”
There may be a few minor revisions necessary (this is a wordy card, so maybe drop “during your turn” to save space) but I think that would be more reasonable than the card looks currently.
And the use of “other” to exclude All-Knowing itself is similar to abilities like the Barf’s Song Of Mending harmony part, which uses “each other hero” to exclude the Bard himself.
Even given the OL’s myriad of attribute test cards, this card just looks too easy to use without “exhaust this card”.
Edited by LightningclawEh. I’m just going to leave the typo