Bjorn spiritcaller
Players
What to know
Bjorn spiritcaller has 1,500 health.
It takes extra damage from fire; it resists blunt, pierce and frost; spirit does nothing to it at all. Slash lands at full damage, so that is what to bring.
Its hardest hit is bite at 100 pierce, out of 6 attacks.
Of everything craftable, 
Lightning Strike, 
Thunderblood Greatsword and 
Frostfire Greatsword put the most damage through what it resists.
It can be tamed with 
Blueberries.
Taming food
Spawn command
With devcommands enabled, this spawns Bjorn spiritcaller in front of you. The third number is the level: 3 spawns a 2-star.
Creature ID: Bjorn_spiritcaller · all console commands and IDs