Arcturis

Arcturis is a spirit beast found near Amberpine Lodge, in Grizzly Hills. He is the first Spirit Beast to have the look of a bear.

Abilities

Frozen Bite — Inflicts 120 Frost damage every 3 for 6 sec. Movement speed reduced by 10% for 6 sec.
Pounce — Leaps to the enemy's location. In addition, Physical damage is increased by 150% for 8 sec.

Arcturis is on a variable spawn timer that begins from time of kill/tame. This timer DOES reset with server downs and maintenance days.
Arcturis is the only spirit beast limited to a single known spawn point.
Despite being a rare creature, Arcturis is not on the list of creatures needed for the [Northern Exposure] achievement.
The name Arcturis is likely inspired by the name Arcturus, the name of the brightest star in the constellation Boötes, which in turn is derived from the Greek word άρκτος, meaning "bear".