Before starting the fight, it is important that one player with low health awaken him. While this will cause flames to appear at the entrance, Vasa immediately performs his special attack upon starting the fight. Players should not stand near the flames either, as they will be subjected to his special attack.

Vasa of Runescape gold is special attack can be deadly for those unprepared. He teleports half of the team next to him, while the other half are placed randomly across the room. He will then launch multiple projectiles near him, dealing heavy damage (player's current hitpoints at that time - 5), so it is recommended to keep health low and quickly heal up to avoid being combo'ed out. In groups, the players teleported to the edges of the room should activate Protect from Magic and quickly move to next to him, as it will reduce the damage of this attack to deal 50% of the stunned players' health instead. Unfortunately for solo players, they will always be teleported next to him and will have to tank the incoming damage completely.

Vasa heals himself by going one of the four crystals in the corners of his chamber. The one that he heads to will always glow, so head there and attack the glowing crystal. The crystals usually give the most points in the encounter. They are weak to stab attacks, so the Ghrazi rapier is highly recommended in deactivating them. Vasa will return to the middle of the room if he finishes healing from the crystal, or it is disabled by the team. On every third crystal, Vasa will walk over to it but immediately make his way back to the center of the room, so the glowing crystal should be ignored and players whittle his health down quickly to conserve supplies.

Vasa has a high Magic level, so the twisted bow is highly recommended to end the encounter quickly, as a prolonged fight will exhaust OSRS gold the player's supplies significantly faster compared to the other bosses. Otherwise, use a blowpipe with dragon darts or a ballista. The dragon warhammer can make the fight go significantly faster as he has moderately high Defence.

As his standard attack, he expels boulders from himself and land at the player's position. This can be avoided by running away (they have a 3x3 AoE); Protect from Missiles will reduce the damage from this attack. He also has a stomp attack for players underneath him.

Upon death, Vasa drops two Xeric's aid (+) and Twisted (+). The twisted potions are useful for any room requiring Ranged.