The normal PVP in the arena is defeating the enemy and drain their health to zero. Since it was held in an arena, this is not counted as PK and the death of the player who lost the PVP will not receive any kind of penalty to the loser, just a reduced amount of Arena Coins that they can earn after a battle.
But PVP Deathmatch mode is different. Like many FPS games in PC platforms, these mode works similarly. There is no time limit in this battle compared to the normal PVP where the limit is 5 minutes. In PVP Deathmatch, the two players will fight to the death, however, once someone dies, 10 seconds later, the player who died will be restored back to health with full MP and HP while the enemy will stay the same health. The battle will end once one side managed to rack up at least 15 wins.
'And this bastard purposely chooses this mode. Is he that confident to fight against me?'