Just before Oliver's clone could reach the clone possed by the dragon soul, the latter lit up on fire but the fire didn't consume him, instead, it consumed his opponent. The fire was so hot that the heat could be felt outside the dome. The clone possessed by the dragon soul has the abilities of a dragon, and one of those abilities is to lit himself on fire so hot that everyone around would be burnt to ashes.
"It's more incredible than I thought." Celine said happily before looking in the direction of the scientist. "I will call it Draignis." Celine chipped happily and the leader couldn't agree more.