The creature has a magical power that deals [1d6 x CR] damage on a successful magic attack roll (range 30 meters) against a single target. If you prefer to roll fewer dice, convert half the d6s into an equal number of +3 damage bonuses (8d6 is equivalent to 4d6 + 12). Alternatively, the power deals the same damage in a 10-meter-diameter area; a successful DC 10 Dexterity check allows targets to halve the damage.

The creature has magic that lets it teleport up to [20 x CR] meters. The destination must be within line of sight or perfectly known (10 minutes to study the location). Alternatively, the GM may choose to give it a magical flight ability (equivalent to Fast Flight).