By forcing opponents to draw cards when you cast spells, youll be able to trigger Unagi at Kiyoshi Island extremely easily
Magistrate's Scepter If you have patience, Magistrate's Scepter grants you extra turnsjust add three charge counters, then cash them in
This Legendary Creature card has a high cost to play, but it is very much worth it with the game-shattering effect of giving your Creatures plus two / plus two while giving your foes Creatures negative two / negative two, which has shown itself to be absolutely game-defining in the Commander format
You can pull a disappearing act in response to a boardwipe or attack, or use it on your own turn to prevent payback after overextending
Arixmethes, Slumbering Isle Arixmethes, Slumbering Isle is a 12/12 kraken that lies dormant until you remove all five slumber counters, and you can take one off whenever you cast a spell