The deck plays well on other players turns and has a bunch of ways to accrue value
the old multi-coloured lands from Ice Age are a cycle that still see a lot of play now in multi-coloured decks, with the cycle introduced here being colloquially called the 'pain lands' because they deal 1 damage if you use them to make coloured mana
Goro-Goro, Disciple of Ryusei Goro-Goro, Disciple of Ryusei makes for a somewhat lousy commander but an excellent member of your 99ers, and a great example of the token generators that can create big, mean creature token dragons that your opponents would rather not have to deal with
You can also use Show and Tell as a bluff and counterspell bait
Siegfried, Famed Swordsman, for example, may be a 2/2 when in your graveyard, but chances are, it will enter with a ton of extra +1/+1 counters on it