Conjure Spectator

This spell has a chance of success equal to ten percent for every beholder eyestalk used as a material component. (For example: when using 4 beholder eyestalks, the spell has a 40% chance of success. When using 10 beholder eyestalks, the spell has a 100% chance of success.)
When this spell is successfully cast, one Spectator appears in an unoccupied space within ten feet of you. The Spectator is friendly to you and your allies and obeys your commands.  The spectator lasts for 101 years or until it drops to 0 hit points.