There are some actions in Dark Souls 2 that give you what players refer to as "iFrames" or "Invincibility Frames". The most common contributor of this is rolling, which can be increased by levelling up your agility/adaptability.
Is there anything else that has "iFrames" in their animation? For example, using a lifegem?
Best Answer
The only ways to get invulnerable in DS2 are:
In DaS1 you were also invulnerable when entering fog gates, but that's no longer the case in DaS2.
Edit: to answer your last question, using healing items or spells not only does not make you invulnerable, it actually enrages mobs to come at you and stop you! Plan healing for when they're out of stamina or you'll probably die.