the infinite energy helps ALOT. for the first room just run around the room chopping roots. this is important as soon as u see the screen shake run to another root thats far enough that u wont be hit by the splash. it doesnt matter what ur doing if the screen shakes just run! when ur placing the logs in the pyre only put 2-3 logs at once, try to remember the 3 pyres u put the logs in, after u filled 3 light them together. for the second room just run around the room and stay close to the soft soils, make sure the beast isnt too far from you, cause if he releases the dark core and it doesnt see u he'll just pick it back up and ur going have to wait for the next one. after u bury 2 dark core his attacks are going to be very fast and he splash area is alot bigger, u have to just keep running cause he attacks like every other second. the trick is that he doesnt attack when the core is out so just get the attention of the core next to a soft soil. the last room just keep track of one of the souls at a time, because once it goes into the grave u wont be able to see it, u need to memorize where the soul is because u wont have alot of time to bless the grave. again always run when the screen shakes, no matter what your doing