Spawns several a Fledgling War Boar during the fight with him. All in the pen nearby.
Every 5.5mins or so he emotes: Glykus Helmir blows a carved boar horn. 'My pets! I enfuse you with the power of Zek. Grow and Battle with Glykus!'
(yes enfuse should be infuse, I believe)
He will do this up to 4 levels of difficulty:
a Fledgling War Boar (lvl 55)
an Enraged War Boar (lvl 61)
a Fierce War Boar (lvl 62)
a Greater War Boar (lvl 63)
an Enchanted War Boar (lvl 65)
If they haven't added to the fight yet, Enchanted War Bars will come to his aid after the next power up.
Great for finishing off Achievement: I'm Boared!