Ultron
A/N: The last 3 lines that I edited out were originally:
I once had strings/ But now I'm free/ There are no strings on me.
See^ way to easy. For those of you who don't know who Ultron is, pretty much Ultron is the 2nd most bad-a villian in the Marvel Universe. Basically, in non-Marvel terms, the bad guy rip-off of Iron Man who you have (or will have) seen or heard of by the end of the year.
@JordanSam and @dam_catching_potter both solved the riddle within an hour of each other! They both win today!