So I woke up to a 1000 Wiz Token in my inventory, but I appear to have sleepily deleted the event that told me who sent me such a precious gift! Is there any other way to figure out who sent it so I can thank them?

There's no way to get deleted events back and there's no even history page either.

You could however make a topic in the Gift Bragging section of Bragging and Complaining, hopefully the person who gifted you the Token will see it then.

it may have been an achievement prize and not a gift though, if you had bought something from the token shop

You could probs file a ticket and they could check where it came from, honestly.

THIS ONE. Thank you! I just checked because I had gotten something from the Token Shop, and that was apparently the prize. ^^ Thanks, mystery solved.