TIL wizard-themed confetti is a thing that actually exists and can be purchased.

Sold for a Max's Severed Head(18 Keys at the time) and ~1 Keys in Sweets(19 Keys total)

http://backpack.tf/profiles/76561198051943363#!/compare/1488672000/1488931200

http://backpack.tf/profiles/76561198064416761#!/compare/1488153600/1488672000

Sold for an Australium Spec KS Grenade Launcher(~15 Keys) and 1 Key(16 Keys total)

http://backpack.tf/profiles/76561198119475341#!/compare/1486252800/1486339200

Sold for 17 Keys

http://backpack.tf/profiles/76561198119475341#!/compare/1486339200/1486512000

Sold for a Bubbling Mann of Reason(14.5 Keys, round to 15)

http://backpack.tf/profiles/76561198325987339#!/compare/1490832000/1491004800

15-19.

Credits to Mindacos for finding the proof. All I did was make the actual suggestion.