In fact, in Elden's Ring, we often encounter the problem of how to obtain the Elden's Ring cannon. In fact, there is no need to worry, just these few small steps can solve this problem.
Tourists please give priority to going to Gmir Volcano [Ninth Rest Stop].
After teleporting from there, go straight across the bridge and ignore the monsters you encounter along the way.
Next, after crossing the bridge, head to the left and you will soon find a cave. This is our destination - the Volcano Cave.
After successfully entering the cave, if you encounter any monsters, please ignore them for the time being. Go straight to the deepest point and turn right there. There will be a cave entrance on the right.
Then go up the stairs until you reach the lowest level of the underground, where you will encounter a BOSS battle.
As long as you defeat it, you will have a chance to receive a powerful cannon as a reward.