If you're looking to upgrade the deck and building specifically around The Ur-Dragon, the goal remains the same: casting big Dragons and winning with them
Theres a good chance thats not worth doing in Deaths Shadow specifically, because we also draw Deaths Shadow itself less often if we make the deck bigger, and Deaths Shadow is much better than the other spells wed be adding
By paying one life, you can exile the top card of your deck face down, putting that card back into your hand during your next end step
Legendary Land Land (CTRL to add secondary) Planeswalker Ajani, Mentor of Heroes +1: Distribute three +1/+1 counters among one, two, or three target creatures you control
When taken at face value, Imotekh the Stormlord comes across as an artifact creature go-wide commander with an emphasis on combat