At the very least, at every opponent's draw step, they draw a card
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
Relic of Progenitus, Preordain, and Skullclamp are all notably valuable because this deck contains their only retro-frame printing
When Aang enters, airbend up to one other target nonland permanent
Aerial Responder is probably most at home if youve got a strategy that relies on counting keywords, like Odric, Lunarch Marshal or Kathril, Aspect Warper
This is great defense and value, it helps cycle through your deck and it offers both artifact and creature synergies