Its just too slow when compared to the other options 5 color Ur-Dragon decks have for cheating creatures into play
plus the return of some old favorites
Overall, I think this Starter Deck is worth its price, especially if you have your eyes on certain Madrigal cards you want to test before purchasing multiple copies of them
There are new dual lands, as well, and these ones seem pretty powerful, entering untapped and tapping for colored mana as long as they just entered or you have at least one basic land
If you rely mainly on creatures, which is very possible to do thanks to all the great black options that have been printed in recent years, then Mai offers extra pressure at no cost to you
Once you have resolved Goblin Matron, she makes great sacrifice fodder in the late game