You gain the power to kill people in ironic ways like Final Destination Death.
The problem being that you must know the situation you put them in is ironic and visually plot out their death to do it.
The more accurate your idea of ironic death is, the easier it is to do.
You can only do this to one person every 24 hours.
How do you misuse this power? (those who do misuse it).
If you don't use it, then you die a very ironic death yourself in 24 hours, how do you think your death would look like?