Killer Instinct gives a bonus to party members (including yourself) the killer trait of your current pet. Ability is AoE, and grants approximately a 10% increase to the killer trait to all party members in range.
Also applies a Circle Protections effect that grants a +15% damage boost to both physical and magical damage against the affected monster family (Arcane Circle vs Arcana type monsters).
Additional merits increase the duration of this effect by 10 seconds per merit, to a maximum of 3 minutes 40 seconds.
Does not wear off if the Leave command is used or pet is killed.