He's a towering abomination of science and magic. She's an eight year old with a beehive hairdo, and undiagnosed pyromania. Name a more iconic duo. I'll wait.
Pumpkin Prince Amumu
Witch's Brew Blitzcrank
Annie
Goth Annie
Red Riding Annie
Count Kassadin
Trick or Treat Ekko
Count Kledula
Nightmare Tryndamere
Ravenborn LeBlanc
Haunted Zyra
Headless Hecarim
Haunted Maokai
Underworld Twisted Fate
Wicked Lulu
Annie in Wonderland
Prom Queen Annie
Frostfire Annie
Reverse Annie
Panda Annie
Sweetheart Annie
Hextech Annie
Super Galaxy Annie
Annie-Versary
Lunar Beast Annie
Cafe Cuties Annie
Fright Night Annie
Winterblessed Annie