RPGMemes

The last one is actually covered by it I'd say, because (as by rules of spell targeting) you cannot see the blood and furthermore (as confirmed by "Water breathing" not working in wine) spells that affect water really only affect water and that’s it.

I know you mean it as a joke, but in my experience, punishing a player for trying to find out what you will and won’t allow them to do is a good way to get players that don’t want to be creative. Just tell them that you will not allow it. (Also… poor Mystra for having to waste that much divine power on someone trying to use spells in a way it can’t be used in anyway.)

If everyone at your table is habilitated fun, then… well, have fun, but I'd advise against it.