Full of MCU humor and plenty of goofy holiday fun. Reclaims Santa for Norse mythology by insisting that he's really Jólnir, though he makes even cynic Tony Stark believe -- in Marvel logic, Santa is part Frost Giant, part Alfheim elf, plus Santa can control space-time, which is how he can deliver gifts to what JARVIS estimates must be over 5,000 households per second. Loki is a delightfully charming villain even if his heart doesn't grow three sizes that day, and the whole film would be worth watching just for the scene of Thor pulling Santa's sleigh along with the reindeer.