Scarlet Upgrade: Caustic Blood

Prerequisite(s): 10th level sanguine sorcerer, able to cast Caustic Blood
Benefit(s): Apply the following modification(s) to your Caustic Blood spell:
1) Caustic Blood is treated as a Scarlet Spell.
2) "School: transmutation [acid]" becomes "School: transmutation [blood]".
3) "Casting Time: 1 standard action" becomes "Casting Time: 1 swift action".
4) "Components: V, S, M (vial of black adder venom)" becomes "Components: V, S".
5) "Saving Throw: Reflex half or negates; see text" becomes "Saving Throw: none".
6) The effect of Caustic Blood becomes: "Whenever another being bites you (or performs a similar action), that being becomes nauseated for 1 round."
7) "While you are assimilated with a host (as described in the Sanguine Form class feature), you can spend a standard action in order to launch a torrent of blood at a being that is within 30 ft. of your host (roll a d20 and add your caster level to the result of that roll); if the result of your roll exceeds that being's touch AC, you cause them to begin to bleed for 5 points of damage each round. This effect persists until that being dies, unless it is ended prematurely via a Heal check with a DC of 20 or via the application of an effect that restores hitpoints." is added to Caustic Blood.
8) "Special: Whenever your host deals hitpoint damage (excluding nonlethal damage) to a being that is currently bleeding as a result of the effect of Caustic Blood, they gain a number of hitpoints equal to the amount of damage that they dealt divided by two (rounded up)." is added to Caustic Blood.