For 12 loyalty counters, which is a lot, you get to shuffle every nonland permanent an opponent controls into their library, minus one
You're already aiming for in your mana pool, so Two-Headed Hellkite is well worth it, and both flying and menace make it easier to attack with less likelihood of being blocked
[24] The goal in creating this panel was to "hear the full range of the Commander spectrum, from players who prefer extremely casual decks to 'cEDH' (competitive Commander) players." Principal game designer Gavin Verhey stated that while the Wizards of the Coast designers will make the ultimate "final calls" on the format, he expects "that most of the time majority opinion on the panel will win out"
Now, a big enough hit can still finish him off if it exceeds the heal, but thats a tall order given his towering Wounds pool
First up is Krydle of Baldurs Gate, who is a two-mana Blue and Black 1/3 Human Elf Rogue