Exiled Knight Oleg is one of the more powerful necromances you can get early in your journey. He is great at drawing enemy attention and will attack relentlessly even when surrounded by enemies. He’s definitely a worthy summons to rely on. Here you will find the necromancy of the exiled knight Olen in Elden Ring.
If you have the ability, you can grab this necromancy almost instantly when you start a new game. This is because you get this necromancy from the Fringefolk Hero’s Grave dungeon next to the first Site of Grace you come across. You must grab two Stone Sword Keys before you can enter this dungeon. In order to reach the necromancy you have to traverse the dungeon and at the end defeat the Ulcerated Tree Spirit boss.
To reach the end of the dungeon you will have to use the alcoves in the walls to avoid getting hit by a chariot going up and down the ramps. You can quickly traverse the dungeon by getting to the third alcove on the right side of the first ramp. Wait for the chariot to go up the ramp, then jump onto the second ramp below. You have enough time to run down the second ramp before the chariot can reach you. When the path splits, take the left path and it will lead to the boss. You can easily beat the boss if you stay close to him and get used to his patterns. It has few attacks that can hit you. If you feel like you can’t beat the boss right away, come back later.
https://www.gamepur.com/guides/where-to-find-the-banished-knight-oleg-spirit-summon-in-elden-ring Where to find exiled knight Oleg’s necromancy in Elden Ring?