Pathfinder: Shadow of Chernobyl
The elf's body was fused full of Artefacts and his skin swirled with rainbow colours. We had never seen anything like it but he said that the things empowered his magic, filled him full of raw energy.
All was going well until we encountered a roving pack of Mutants. He conjured up a bolt of magic to fling at the beasts but he seemed to lose all control of the spell. Lightning crackled around his body as he looked around panicked and there was nothing any of us could do for the poor man.
He was raised up on a draft of magic and his body seemed to compress in on itself before exploding outwards in a shower of gore."