Upon speaking with him if you're still alive Rogier provides you with Rogier's Rapier +8, which is a magic sword that comes with Elden Ring Runes the Carian Phalanx Ash of War built in. Expand his dialogue options and swiftly return towards his Liftside Place to find Grace at Stormveil Castle.

Where can you find Rogier's bloodstain? (Stormveil Prince of Death)

The next quest's phase is fighting a tough battle against the Ulcerated The Tree Spirit. This quest doesn't have a timer which means you can postpone the battle until you've gotten to a higher level and obtained different equipment. Also, don't talk to Ranni as of now if you're looking to complete this quest.

Turn right after leaving the Liftside chamber, and go straight. You'll see a ledge with an unidentified corpse on it. Approach the edge, and fall down onto the rock below. The fall will reduce your HP but it's not going to cause death. Make sure you are safe and secure on the beam that is jutting out beneath your feet, turn left and then jump on the scaffolding. Take a step back to the ground, and deal with the rats prior to moving on.

You must defeat the Teardrop Scarab as well, since it grants the potent Rancorcall sorcery.

The crypt's narrow confines eventually expand into a vast area, exactly where the Tree Spirit appears. Besiege it, then enter the chamber that lies behind it. rub the bloodstain on the back of the Prince of Death --the massive dead face to Elden Ring Items see a vision about Rogier. Return to the Keep and talk to Rogier once more.