This glow effect is a combination of particle systems and a shader. Im using three different particle systems here, one for the stars, one for the small golden particles and one for the big shiny part around the shield. The stars are just a simple material with a star texture being emitted upwards, the small golden particles are pretty much the same as the star, but with two random start colors between yellow and darker yellow instead of a material. The large glow effect around the shield is actually the same as the smaller golden particles, but it has more emission, bigger start size and has a much higher limit velocity over lifetime. Im also using a simple outline shader on the shield as a finishing touch to the effect.