Scarlet Upgrade: Phantom Blood

Prerequisite(s): 1st level sanguine sorcerer, able to cast Phantom Blood
Benefit(s): Apply the following modification(s) to your Phantom Blood spell:
1) Phantom Blood is renamed to "In Case Of Emergency".
2) In Case Of Emergency is treated as a Scarlet Spell.
3) "School: necromancy" becomes "School: necromancy [blood]".
4) "Casting Time: 1 standard action" becomes "Casting Time: 1 immediate action".
5) "Components: V, S" becomes "Components: V".
6) "Duration: 10 minutes/level" becomes "Duration: 1 round".
7) The effect of In Case Of Emergency becomes: "Upon being struck by an attack/spell/etc. that deals hitpoint damage (excluding nonlethal damage), you can spend an immediate action in order to cast In Case Of Emergency, in which case you gain fast healing [x] for 1 round."
8) "[x] is equal to 50% of your maximum hitpoint total (rounded down)" is added to In Case Of Emergency.
9) "Special: Each time you cast In Case Of Emergency, you must roll a d100; if the result of your roll is less than 100, you lose the ability to cast spells via Blood Magic for 1 hour." is added to In Case Of Emergency.