Some include a physical or vocal component, like Blacker Lotus or the Gotcha! mechanic on Touch and Go, some have rules that specifically reference flavor text or artists, like Carnivorous Death-Parrot and Drawn Together, and some require interacting with people or objects outside the game (Ashnod's Coupon being my favorite)
They probably dont even know I exist
Oversized cards used to come in every Commander precon, but that is no longer the case
How many of these have you played
Charizard ex is a fairly straightforward deck that accelerates Energy and hits harder based on how many Prize cards the opponent has taken
With Alania's ability to copy the first spells you're casting, you can double up on a lot of powerful instant and sorcery effects, as well as your best Otter cards