A teenager bled to death in the street after being stabbed through the heart and lung with a 13.5cm (5.3in) zombie knife in a frenzied attack, a court has heard.
Tristan Kerr, 17, collapsed in the arms of a friend and said: "I'm hurting - my side. I love you, bro. You're a good 'un you are," Newport Crown Court was told on Tuesday.
Georgie Mears, 19, from Thornhill, Cardiff, is accused of attacking Kerr at a house in Lower Francis Street, Abertridwr, Caerphilly.
Mears, along with Connor Palfrey, 24, from Abertridwr, Ricardo Elliot, 27, of no fixed address, and Elexi Manny, 24, from Senghenydd, Caerphilly, all deny murder through joint enterprise.
Kerr was pronounced dead at the scene. A post-mortem examination later found the 13.5cm stab wound.
Prosecutors said the motive for the alleged attack was unclear, but text messages between Palfrey and Elliot showed they were dealing drugs, including cocaine, ketamine and cannabis, and discussing the collection of drug debts, which they described as "straps".
The court heard the three men were driven by Manny in her Volkswagen Polo to locations around Cardiff and Caerphilly. The trial continues.