The Judge Cougar (Sacred Skies Youth Camp)
Activate this mission by freeing the Sacred Skies Youth Camp in Faith's region, and talking to the starred NPC.
Follow the plot marker to a spot east of Dead Man's River.
Find the cougar shrouded in bliss mist.
As you continue to deal damage, the cougar will seeem to change shapes. First into a pair of turkeys.
When the turkeys go down, the cougar will have seemed to disappear. Bait won't flush it out, so just head uphill until the phantasmal bison stampede attacks.
Gun down the bison, then finish off the cougar itself.
Its death completes the mission. Loot it for regular cougar hide.