Greater Spell Resistance

Transmutation
Spellcraft DC: 45
Components: V, S, Ritual
Casting Time: 1 minute
Range: Touch
Target: Creature touched
Duration: 20 hours
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)
To Develop: 405,000 gp; 9 days; 16,200 XP. Seed: fortify (DC 27). Factor: +10 additional SR (+40 DC). Mitigating factor: two additional casters contributing 6th-level spell slots (-22 DC).
The character grants the subject touched spell resistance 35 until the duration expires. The spell resistance granted does not stack, but overlaps with, any previous spell resistance. This is a ritual spell, requiring two other spellcasters, each of whom must contribute an unused 6th-level spell slot to the casting.