Bio: Dee was a man in jail for minor charges and kept in regular
contact with his girlfriend. When he found out that his patrol request
didn't go through, he was saddened. Pnly when his girlfriend dumped him
as well, did it make everything turn for the worse. He snuck into the
ESP machine--something a scientist was testing on the patients--and went
for a prolonged "test." The test gave him the ability to not only read
peoples minds, but to get inside them as well, wreaking havoc in their
dreams and even forcing them to go insane and die.
Despite his love for his girlfriend, when Destiny found out she had
found another man, he did just what his new powers allowed him to do:
get inside her head. She eventually died at the hospital, unable to hold
on any longer. Destiny trapped all of the League in their dreams, sans
J'onn and Batman, and played out their deepest fears: Hawkgirl was
trapped inside a coffin (claustrophobia), Flash was trapped inside a
world where he moved so fast, nobody else could see or hear him--trapped
in there for eternity, Superman became so strong and out of control, he
killed all those he loved, and Green Lantern wasn't accepted back in his
old neighborhood because of his status as a Justice League member.
Batman eventually took down Destiny and the rest of the League woke up
from their dreams, but not without memories of what it felt like to be
trapped in those situations.