D/D Berfomet (DOCS-EN010) - Dimension of Chaos 1st Edition

Once per turn: You can target 1 "D/D" monster you control, except "D/D Berfomet", and declare a Level from 1 to 8; it becomes that Level until the end of this turn, also you cannot Special Summon monsters for the rest of this turn, except "D/D" monsters.