Talk:Rhino/@comment-5878824-20151214072938/@comment-5878824-20151214165653

Iron skin has a 3 second invulnerability period when cast. During this time, it absorbs damage and those add to the HP pool of iron skin.

So if you got a stronk explosive weapons like Penta/Castanas/Angstrum etc you can bump up your iron skin if you are quick. It is no different from the old Nyx + penta/castana absorb trick.