Cordial Vampire will buff the team whenever any creature dies whether yours or an opponents
If your deck has weaker creatures, you can easily put quest counters on Overseer Of Vault 76 to later pump up your creatures with +1/+1 counters and give them vigilance so they can block after combat
These cards are alternative versions of other cards (similar to the Godzilla cards from Ikoria)
Like most Magic: The Gathering cards, the value of Chart a Course depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Secret Lair Drop)
The card that really interests me in this vein, though, is this forgotten draft bomb: Heck yeah, killer paramecia
Even if a handful of your cards are off-theme, the deck will most likely be awesome to play