Dragon Knight is a melee character. His primary attribute is strength. The hero is mainly taken as a hardlaner. Most effective in the early and mid game.
Dragon Blood allows the hero to frontlane and get through even the hardest lane. Enemies affected by the Breathe Fire ability pose less of a threat during fights. Dragon Tail makes an enemy easy prey for Dragon Knight’s allies. Elder Dragon Form helps the character become more effective in almost any fight and speed up the demolition of towers and buildings. With the purchase of Aghanim's Scepter, the ability will also allow the hero to fly over obstacles. Aghanim's Shard grants the character the Fire Ball ability, which increases lane pressure and can be a useful tool in team fights.
When Davion tracked down the ancient dragon, it was already old and weak. The knight saw no honor in killing him. However, Slyrak gave a whispered plea that Davion might honor him with death in combat. In the fight, their blood mingled and the dragon's death sealed their bond giving birth to Dragon Knight.