Flint felt his stomach burn as he drank the bodyguard's blood. A moment later, he changed exactly like the bodyguard. Even their clothes were the same.
His power made his camouflage targets disappear so Flint had nothing to worry about. However, his disguise time only lasted for two hours. He would return to himself and had to wait five hours before he could use his power again.
Camouflage duration was different when Flint disguised himself as an animal or object. His power could last for five hours and did not have a 'cooldown' like when he camouflaged as a human. He could use his power without having to wait five hours.
However, camouflaging into an animal or object was risky. If he died or was damaged then he would lose his life and could no longer turn into a human. That was why he targeted a bodyguard.
