In Dark Souls 3, the level up system has been slightly revamped so that monsters killed only yield a small amount of souls. Hence there must be a fast way to repeatedly kill monsters so that one can accumulate souls fast. Such a way exists, provided you have not killed the Rotted Cursed Greatwood.

• Do not kill the Rotted Cursed Greatwood until later on in the game, when cheap ways to accumulate small amounts of souls repeatedly are ineffective anymore.
• This translates to 300 souls per minute, more if you go hardcore.

Also trains you on to dodge, and anticipated pattern attacks of monsters.

Enjoy!