If that Dragon was legendary, the token is no longer legendary, letting you double up on abilities that you have no right to have two of
Not only are these five lands perfectly good fixing but they come complete with a free, powerful and hard to kill threat
Exile is nice, that probably more than offsets the risk of the 3/3 token but the sorcery speed on top of the target restriction makes this undesirable for most cube settings
Then you can play lands from your graveyard, and I am running two fetch lands that cost pretty cheap in my land base as well as Krosan Verge
2-drops that quest for 2 lore are always worth considering in aggro decks
This was also the only Ravnica set where you could open all ten Shock lands, in theory, which made Dragons Maze packs exciting regardless of the middling card quality found elsewhere in the set