Ethereal Sight. The beckoned spirit can see 60 ft. into the Ethereal plane when it is on the Material plane, and vice versa.

Incorporeal Movement. The beckoned spirit can move through other creatures and objects as if they were difficult terrain. It takes 5 1d10 force damage if it ends its turn inside an object.

Undead Nature. The beckoned spirit does not need to eat, drink, breathe, or sleep. Additionally, necrotic damage heals the beckoned spirit rather than harming it.

Spectral Assault. The beckoned spirit's attacks are considered magical for the purposes of overcoming resistances.

Coordinated Attacks. At the command of the Soulbinder, beckoned spirits can coordinate a single attack with other beckoned spirits within 10 ft. of themselves. When they do this, choose a number of beckoned spirits within range of each other and roll a single attack roll using the beckoned spirit's attack bonus; but for each additional spirit, add a +1 to the attack roll. If the attack hits, the damage is equal to the damage of the spirit's Slam attack multiplied by the number of spirits that were part of the attack.