From Lineage 2 Encyclopaedia

Properties

Spirit Sharing
For 20 minutes, increases P. Atk. by 3%, M. Atk. by 3%, Skill Power by 5%, Atk. Spd. by 2%, Casting Spd. by 1%, and Critical Rate by 5%. The master's abilities are extended to the servitor.
Class	Phantom Summoner
Type	buff
Attribute	-
Recast time	2 s
Cast time	4 s
Cast range	0
Classes with same skill	Warlock, Elemental Summoner, Phantom Summoner, Arcana Lord, Elemental Master, Spectral Master

Skill Upgrade

Lvl. to Learn	Skill Lvl.	Description	MP Consume	HP Consume	SP
44	1	For 20 minutes, increases P. Atk. by 3%, M. Atk. by 3%, Skill Power by 5%, Atk. Spd. by 2%, Casting Spd. by 1%, and Critical Rate by 5%. The master's abilities are extended to the servitor.	39	0	37
62	2	For 20 minutes, increases P. Atk. by 4%, M. Atk. by 4%, Skill Power by 7%, Atk. Spd. by 5%, Casting Spd. by 3%, and Critical Rate by 7%. The master's abilities are extended to the servitor.	58	0	200
70	3	For 20 minutes, increases P. Atk. by 5%, M. Atk. by 5%, Skill Power by 10%, Atk. Spd. by 7%, Casting Spd. by 5%, and Critical Rate by 10%. The master's abilities are extended to the servitor.	65	0	711