Spell level and DC

[Clovis]

Hope this is the appropriate forum. I created a spell for D&D3.5 and I'n not sure what level and what DC it should have. Any advice would be greatly appreciated. Thank you!

Specifics below:

STOP
Level ?
Designed to take out spellcasters this nasty spell targets the (often) weaker constitution score instead the stronger will save.

Verbal component: 'Stop'
Somatic component: rubbing the spell component between the fingers of the casting hand (see note for exceptions)
Spell component: (dried) blood from the same monster type as the target
Casting time: fast
Effect: immediate
Duration: 1 round per caster level or death of the target
Range: 10ft per caster level
Saving throw: a successful SR negates the effect. SR is CON based. DC ?
Evil/Necromancy

Upon casting this spell the caster shuts down the life functions of the target. The body freezes completely: the muscles lock into their position, the heart stops beating, the lungs stop breathing, the eyes freeze in their place, the nerve synapses stop transmitting. The target is practically dead.
The caster can hold this status until the duration of the spell (concentration check) or it can be released at will as a free action. Depending on the target's constitution she may die before the release/expiration of the spell.
Since all bodily functions are shut down there is a cumulative chance (1% per round) that the target's body fails to restart after the spell is ended.

Note: the blood type designates the target: humanoids, aquatics, dracoforms, fiends, aberrations etc. The blood need not be fresh, a few flakes of dried blood is sufficient. However, using fresh blood of the victim increases the save DC by two (two caster levels). In this case the blood need to be put into caster's mouth before uttering the command word. This can be accomplished by eg stabbing the target and then licking the weapon. Using one's own fresh blood does not have any special effect in this regard unless the victim is a relative: using one's own fresh blood and targeting a close relative also increases the spell DC by two.

[aimlessPolymath]

Formatting spells:

Verbal component: 'Stop'
Somatic component: rubbing the spell component between the fingers of the casting hand (see note for exceptions)
Spell component: (dried) blood from the same monster type as the target
Components: V, S, M

Casting time: fast
Undefined: Did you mean "standard action"?

Effect: immediate
Unimportant.

Duration: 1 round per caster level or death of the target
Mentioning the death of the target is sorta irrelevant. Also, concentration is mentioned in the spell description.
You want "Duration: Concentration, up to 1 round/caster level".

Saving throw: a successful SR negates the effect. SR is CON based. DC ?
DCs are standardized to 10 + spell level + casting ability mod. Did you mean "Fort negates"? Fortitude is the saving throw linked to Constitution.'

Range: 10ft per caster level Standardized ranges are Close (25 ft + 5 ft/2 levels), Medium (100 ft + 10 ft/level), and Long (400 ft + 40 ft/level). I would rate this range at Close.

Stuff about blood goes into the material component description. Stuff about the specific somatic or verbal descriptions goes into a section in italics before the spell description.

Estimating spell level: This is around the power of a standard save-or-die. I would rate it at approximately 5th level (comparable to Finger of Death), maybe 4th (Similarities to Phantasmal Killer, except that only one saving throw is involved, but the effect is potentially survivable in groups. It's somewhat less dangerous against players, who often have a support group to keep fighting or break the caster's concentration, then against monsters, which are often encountered individually.

Blood component has a confusing irregularity where if you use a relatives' blood, it only increases the DC if it's also your own blood. Unsure if this is intentional.
Also,

increases the save DC by two (two caster levels).
Caster level and save DC are decoupled.

[Clovis]

Thank you, Polymath! Your comments are much appreciated. I will make the necessary changes to the spell description.