Chromostar

You summon a radiant light blue orb, partially covered in enigmatic metal and glowing red gems, which hovers in the air within 30ft of you. The Chromostar serves as a sentient anti-magic barrier, creating a 30-ft radius sphere that nullifies any incoming magical effects, including spells, within its area of influence. While the Chromostar is active, you and others inside cant cast spells, but you can manipulate the orb using a bonus action to move it up to 30 ft in any direction. Additionally, any creature other than you that starts its turn inside the sphere must succeed on a Constitution saving throw or take 4d6 radiant damage as the orb pulses with radiant energy