RE: Elden Ring - Boss Fight in Caelid - Putrified Avatar (2nd Attempt)

Recently I was playing co-op mode with a friend and they were having a little more difficult of a time than I because they were a melee type with no fire spells. The good thing is that they had a ton of health and were a great tank that drew away the avatar's attention. I'm starting to get the hang of summons and have found that they are game-changing so far. Yeah, Flame of the Fell God is a great incantation -- the only down side is that it takes a while to cast so I need pour more runes into my Dexterity stat to speed that up. I think I got that incantation from one of the evergaol bosses in Liurnia Lakes. I'm not completely sure on this but I may have needed a stonesword key to unlock that evergaol boss.