The Eruption armour is so much fun I decided to extend the testing period. Extended to some Arachas, and some wild dogs. Have you ever seen a dog go boom? Note that the Eruption feature is a Runeword enchantment that can be applied to armour via the Runewright in Upper Mill. Also note that no actual dogs were harmed during the making of this video.
Video: More Fun With Eruption
The Witcher 3 Guide 