In this casual, multiplayer format, you choose a legendary creature to serve as your commander and build the rest of your deck around their color identity. YOUR DECK: 1 commander card (legendary creature) and 99 other cards (only one copy of any card, except basic lands)
As if it wasnt fun enough to play a card called Pink Horror that synergizes nicely in your Izzet spellslinger deck, when it dies, you create two miniature versions of it called Blue Horrors
If youre aiming for dungeon completion or not playing the long game, this is the worst dungeon for you
When people say everything is just kicker, they're joking about the fact that many Magic mechanics could just be rewritten as kicker instead
Other missions have more specialized criteria for completion, such as obtaining both an Electabuzz and a Magmar card, or completing the legendary bird trio (Zapdos, Articuno, and Moltres)
This has huge value for multi-color decks and mono-color decks alike