RAI you definitely would not be able to target yourself. The spell description starts with: "The touch of your shadow-wreathed hand can siphon force from others to heal your wounds." Technically this sentence is flavor only, but in this case it clearly reveals the intention of the designers.
RAW your meme still works, but I would restrict the spell to target only creatures other than yourself for the reason above. Only if the player has a really cool way to describe how to siphon your own life force and somehow convert it into more life force for yourself, I might allow it...
As a non-American I'm not familiar with any of these things. That dude looks kinda familiar though, wasn't he one of the Beatles? The one that got shot? Bring him back please!
A level 1-10 adventure with a 'bump to lvl 17'? What does that mean? Instantly levelling from 10 to 17, skipping an entire tier? That just sounds silly.
I have a plumber joke, but it's shit