1) Have you tried capping somepony in a video game?
In all seriousness, the first problem you’re having is the very notion of “Blood Lust,” which assumes that anypony, or anything, causes harm to another for no reason other than some made up instinct.
What you have is frustration that you’ve come to realize can be released through violence. What you need to do is find some other way to ease that tension. I don’t know you. I don’t know what your interests are so it’s tough for me to give you a replacement. You could try something constructive, exercise, a form of mindless entertainment like certain television shows or video games. Maybe you could build something of your own to subsequently destroy.
You could even do… more private things if that eases your frustration, either by yourself or with another if they’re willing and of legal age.
2) You have no idea how much the pegasus in Cloudsdale love asking that. They see a unicorn up there and it’s like a field-day.
3) Wow. Catchy.
Is it a work in progress?