Our rockets chase the sleigh,
Through the clouds we fight,
Laughing all the way!
On the same night every year, a mysterious red-robed sorcerer flies his enchanted sleigh to a nearby human settlement, dropping various wrapped packages down the chimneys before making his escape. The goblins admire his courage and tenacity, but not his success rate; as far as they can tell, none of the houses have ever blown up, or even burned down. The sorcerer clearly has no experience with explosives, and so the infamous gremlin artificer Grinchie Charfoot has decided it’s time for the professionals to take over.
Here's another One Sheet for Saga of the Goblin Horde: