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Orserk fights as a Dragon/Electric-element boss (DragonElectric). Attack it with Ice and Ground moves, which deal bonus damage and soften the hits you take back. Strong picks:

Dualith NoctGroundDarkDualithGroundGrassWhalaska IgnisIceFireWumpoIceAegidronDragonGroundBeakon CrystIce

See the full ranking on Best Ice Pals, Best Ground Pals.

Battle tips

Tower fights are timed one-on-one arena battles: you and one active Pal against the leader and their boss Pal. Lead with a Ice or Ground-element Pal so its attacks and its resistances both work in your favour. Keep moving to dodge the boss's wind-up attacks, and use ranged weapons to chip it while your Pal holds aggro.

Bring healing items and keep your Pal fed so its partner skill stays up. A mount helps you kite around the arena and reposition. If you are under-levelled, raise your gear on Upgrades and your team on the Pal Tier List before trying again.

About Orserk

Once you have cleared the tower you can catch or breed Orserk in its normal form for your own team. See its stats, drops and spawn locations on the Orserk page, and the other fights on Tower Bosses.