when you are making bones to peaches tabs, do you have to use bones to make the tabs as well?

 

I wouldnt think so because you need bones to use the tab too.

You only need the runes to make the tabs.

You need to unlock the spell in the mage training arena first. Then you need the runes and 1 soft clay per tablet. Use the lectern in your house to combine the soft clay and runes into a tablet. Voila! B2P Tablet.