Create a bold and powerful emoji representing rock vocal performance in a humanless collage. The design should feature a vintage microphone at the center, surrounded by a heavy, aggressive hardcore electric guitar with sharp, jagged edges. Include crossed drumsticks behind the guitar, symbolizing the intense rhythm of rock music. Add fiery elements like flames or lightning bolts to enhance the raw energy of the design. Use dark, bold colors like black, red, and silver, with metallic or chrome accents to reflect the rebellious, hard-hitting nature of rock. The background should be transparent. emoji