Dungeons & Dragons: Here's All the Playable Races in 'Mordenkainen's Tome of Foes'
Heritage and Half-breeds: Abyssal Tieflings/Daemlings - A fresh take with 9 unique subraces (in the style of Mordenkainen's Tome of Foes) : r/UnearthedArcana
OVERVIEW: Mordenkainen's Tome of Foes Brings High-Level Heat to D&D - Nerdist
Advance review–Mordenkainen shares his notes on dozens of foes in the latest tome for 5th Edition D&D | borg
D&D: Putting The Fling In Tiefling With Mordenkainen's Tome Of Foes - Bell of Lost Souls