Six mana for a 6/6 with flying and trample sounds like a great deal in Standard or Limited, where itd also be a scary threat, capable of grinding for value by bringing itself back after being landcycled
He's great for playing aggressive decks and removing opposing characters, and that smug smile on his face really paints the perfect picture of a pirate
Its important to mention that Niv-Mizzet, Paruns pings dont count as commander damage
Check out this guide on how to build an MTG Commander deck for our foolproof tips to assembling the 99
However, it's an Illusion dying, so you can use Minn's triggered ability to re-enchant Toothy with Fool's Demise for free, then draw the cards off of the original Toothy's death trigger
I really like that last one as you can have one card in Commander from each expansion set, and then if you want more from one set, just do reprints in Core Sets, Commander sets, and Masters