Out of stamina and magic?
Just make some passive skills like...
Infinite Stamina/MP or Stamina/MP Regen 100% every 0.01 sec for Stamina.
MC should also create a skill that will not make it possible to erase/nullify/disable his skills. Since the author isn't displaying MC's stats, we can't even see what stats he has.
He should also have some ultimate resistances against anything. Forced teleportation should be resisted or something of that sort.