There is a hidden trick/cheat that allows you to get an extra token for Gollum’s riddle, each day.
To get the extra token, follow these steps: go to “Share”, click on “email”, the Gmail interface will open, enter an e-mail address and send.
It can be any e-mail address. Repeat this process ten times and you will get an extra token right away.
You can do this process every day and basically earn an extra reward from the Gollum’s Riddle.
The rewards from Gollum’s Riddle are very valuable, you can get even a 24 hourglass or items to train your hero. Good luck.