From Lineage 2 Encyclopaedia

Properties

Checkmate
Attacks the enemy bearing a Death Mark with 2388 Power added to P. Atk. Increases Power upon the consumption of up to 5 souls. Requires a short sword to be equipped. Ignores Shield Defense. Critical hit is possible.
Class	Soul Breaker
Type	active
Attribute	-
Recast time	3 s
Cast time	1.5 s
Cast range	40
Classes with same skill	Soul Breaker, Soul Breaker-, Soul Hound, Soul Hound-

Skill Upgrade

Lvl. to Learn	Skill Lvl.	Description	MP Consume	HP Consume	SP
52	1	Attacks the enemy bearing a Death Mark with 2388 Power added to P. Atk. Increases Power upon the consumption of up to 5 souls. Requires a short sword to be equipped. Ignores Shield Defense. Critical hit is possible.	36	0	79
60	2	Attacks the enemy bearing a Death Mark with 3408 Power added to P. Atk. Increases Power upon the consumption of up to 5 souls. Requires a short sword to be equipped. Ignores Shield Defense. Critical hit is possible.	43	0	194
66	3	Attacks the enemy bearing a Death Mark with 4275 Power added to P. Atk. Increases Power upon the consumption of up to 5 souls. Requires a short sword to be equipped. Ignores Shield Defense. Critical hit is possible.	47	0	406
72	4	Attacks the enemy bearing a Death Mark with 5180 Power added to P. Atk. Increases Power upon the consumption of up to 5 souls. Requires a short sword to be equipped. Ignores Shield Defense. Critical hit is possible.	51	0	997