If your opponent controls a monster, or a "Performage" monster is on the field: You can Special Summon this card from your hand, but while it is face-up in the Monster Zone, you cannot Special Summon, except "Performage" monsters. You can only use this effect of "Performage Wind Drainer" once per turn. If this card is Special Summoned: You can reduce its Level by 1. Once per turn: You can change the Levels of all Level 4 "Performage" monsters you control to Level 5.