Channel lets you pay life to generate a huge burst of mana, and then Fireball turns that mana into lethal damage in one shot
(Faithless Looting is just a good card.) My personal favorites in this category: Baral and Kari Zev Gale, Waterdeep Prodigy Wild-Magic Sorcerer Mizzixs Mastery Creative Technique Throes of Chaos Spelltwine Mnemonic Deluge No Kill Like Overkill Sometimes things go wrong
The design revolves around bringing low-cost creature cards back with Eddie, but sacrificing larger ones with Venom
You can choose any player who has a counter, including opponents
Commander is meant to be played in larger groups rather than against single opponents, making it unique
Inalla, Archmage Ritualist Inalla, Archmage Ritualist makes great use of the eminence mechanic