Every single Warlock card from Kobolds and Catacombs saw competitive play (with Cataclysm in Mecha'thun). It's difficult to imagine what Warlock will look like after the rotation, aside from zoo. : r/hearthstone
Hearthstone Meta Report: Priest, Paladin, and Warlock - Esports Edition
Lesser Amethyst Spellstone - Hearthstone Top Decks
Kobolds & Catacombs - Hearthstone Wiki
Best Kobolds & Catacombs Decks So Far (Day 5) : r/hearthstone
Hearthstone: A chat with Blizzard about Kobolds & Catacombs - Hearthstone: Heroes of Warcraft - Gamereactor
Best Kobolds and Catacombs Decks - The Top Deck Lists for the Kobolds Expansion (KAC) - Hearthstone Top Decks
Kobolds and Catacombs Dungeon Run Guide - Bosses List, Treasures List, and Boss Tips & Tricks! - Hearthstone Top Decks
Gul'dan returns: Control Warlock decklists in the Kobolds and Catacombs Standard meta - Dot Esports
Dungeon Run Guide for Kobolds and Catacombs - Hearthstone - Icy Veins
The Kobolds & Catacombs Cards That Hearthstone Community Members are Excited to Play! - Hearthstone Top Decks
Four streamer decks to try from day one of Kobolds & Catacombs - Dot Esports
Kobolds and Catacombs Dungeon Run Guide - Bosses List, Treasures List, and Boss Tips & Tricks! - Hearthstone Top Decks