Splashing blue feels extremely loose but it has a lot of strong cards that only cost one blue, so keep that in mind if you open an Ashiok, Nightmare Muse or Atris, Oracle of Half-Truths and you're already in black
You can get some especially good value if you already have a Birgi out and cant cast another because of the legend rule
Since you are playing a burn deck, you don't want your opponents gaining life, something The Lord of Pain covers by preventing opponents from gaining life (and notably not yourself)
you play Island after Island, pop out irrelevant token after irrelevant token, with no clear purpose
Black has many instants that sacrifice creatures (Deadly Dispute, Culling the Weak), which pair nicely with cards like Blood Artist and Midnight Reaper that care about your creatures dying
Starter Kit 2023 contains the following: 4 Mythic rare cards (two per deck) 12 Rare cards (six per deck) In each deck, one rare is traditional foil