I am a bit worried Explore is generally overrated because it was good in its Standard, but that was a particularly weak Standard so we might have an overly rosy view of it
With tons of strong rares and a natural synergy through their shared transformation mechanics, it just makes sense to seek out other strong lycanthropes when youre trying to improve your list
This uncommon came with a special ruling that had never been printed in Magic before, letting your deck include any number of cards named Relentless Rats in it
Back Me Up Outside of the these broad themes, there are a few cards that deserve recognition
Skeletal Scrying (S, Block) While blue usually draws cards for a mana cost only, black ends up paying life for that privilege
Fast mana, no concessions, near-mandatory to play in every deck, and included in every precon