In order to Obtain Regenerations, you will need to obtain a Fobwatch. This is done by crafting, below you can see the recipes corresponding to what version of the mod. By default, a fob watch will contain 12 Regenerations unless altered by the configuration file.
As well as giving Regenerations, the Fob Watch also allows you to save your regenerations back into it for later use or to give to someone else. You can execute this feature by doing the following: