Theorealize Overdrive (BLGG-EN128) - Battles of Legend: Glorious Gallery 1st Edition

Target 1 "Medius the Pure" in your GY or banishment; Special Summon it. During your Main Phase: You can banish this card from your GY, then target 1 face-up monster you control, and declare a Level from 1 to 10; that monster becomes that Level until the end of this turn. You can only use each effect of "Theorealize Overdrive" once per turn.