Use a Sharpie to make some funny new cards and then play 'em
When The Mimeoplasm enters the battlefield, it can exile any two creatures from any players' graveyards, taking on the attributes of those two cards
Enchantment - Class Ramp (CTRL to add secondary) Removal Shriekmaw Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) When this creature enters, destroy target nonartifact, nonblack creature
But an article about how Commander is, and this is not up for debate, the funniest format would be remiss without some examples
No, Im not (and never will be) on about Chain of Memories, Im talking about the Kingdom Hearts Trading Card Game from many moons ago
and then there's Syr Konrad, the Grim, which is way more badass than he has any right to be