(Image credit: Blizzard) The best Warlock build in Diablo 4 , for my money, is all about the abyss—a new shadow-based skill tag that's unique to their class. While these devil-pacted sorcerers can summon demons or hurl hellfire at enemies, their shadow builds absolutely shred, especially while levelling, thanks to one skill in particular: Dread Claws. As someone who often plays shadow Necro myself, I could only look on in jealousy at some of the cool abyss skills the Warlock gets, including the best shadow-focused minion in the game through their Soul Shard mechanic. Article continues below Warlock key skills, passives, and Soul Shard The Mastermind Shard you get from the Warlock class quest is key to this abyss build (Image credit: Blizzard) One of the most important parts of this abyss build is the Mastermind Shard you get once you unlock the Warlock class quests and the Soul Shards mechanic. The Mastermind Shard gives you a shadow worm minion called Laalish who follows you around and attacks enemies.…