A common flaw in Captain Howler decks is an over-reliance on wheels
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
Sauron, The Lidless Eye Sauron, the Lidless Eye is a five-drop, Rakdos-colored version of the Tolkien villain, a 4/4 that neatly but bluntly expresses both of its colors with two different abilities
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
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