My skin naturally releases positrons, and your antimatter is deflected.
I target the spaceplane the next user paid $250,000 USD to be on with a scalar electromagnetic weapon. ( and steal his deposit)
Ah, but it turns out that I was the fourth horseman of the apocalyspe, and death and Hades follow with me...
more specifically the next user's death.
As it turns out, there was an improperly dealt with open barrel of toxic waste nearby, turning me into Petroleum Jellyman, giving me the power to breathe vaseline and communicate with that spider that got caught in it.
The next user is being sucked into a star only 10 seconds from supernova, and if you attempt to use FTL drive, the mass shadow will tear you into carbon molecules.