In this video I go through how I like to customize existing monsters for D&D 5e. Namely, modifying an existing monster to use in your campaign to match the level your players are currently at.
Important tools: the Encounter Balance Table (DMG pg 82) and the Monster Creation guidelines (starting on DMG pg 273).
00:00 Intro and Agenda
00:35 Why Customize a Monster?
02:10 Dungeon Master's Guide Approach
06:55 Level up example: Zombie
12:31 Level down example: Mummy Lord