Options:

undead
- health still drop but you wont' die.

one hit kill
- as title says.
- didn't test on boss.

ignore SP
- you can always use special attack regardless of your current SP.
- you can open any SP chests regardless of your current SP.
- for Yamoto, you will keep using the special attack even when the SP is emptied. you can press the cancel special attack key (default: Right Mouse Button) to stop the special attack.

Author: Cielos