The easiest way to handle this is to give your monster an extra attack as its legendary action. The legendary monster regains spent legendary actions at the start of its turn. Only one legendary action option can be used at a time and only at the end of another creature's turn. The legendary monster can take 3 legendary actions. Here's the boilerplate for legendary actions: Stock legendary monsters usually have a set of special abilities designed for legendary actions but our custom legendary monster will not. Legendary actions are a little more difficult to figure out. This can be a frustrating ability, though, so you'll likely want to give players a hint that their big save or suck ability isn't likely to affect this monster. It essentially removes any save or suck effect from ruining the legendary monster's ability to threaten the PCs. If the monster fails a saving throw, it can choose to succeed instead. Legendary resistance can be found in any listing of a legendary monster in the Monster Manual. The first, and easiest, is legendary resistances. There are some easy mechanics we can throw right on any monster to make it 'legendary'. The Basics: Legendary Actions and Legendary Resistances Today we're going to look at a simple method for turning any monster into a legendary monster that will shake the resolve of the PCs and give the players a thrill. Legendary monsters get legendary actions, legendary resistance, and, in some cases, lair actions. They have a special set of abilities that put them a step above the rank and file nasties in the Monster Manual. In the fifth edition of Dungeons and Dragons, these single powerful monsters are called 'legendary' monsters. Sometimes we DMs really love to throw a single powerful monster against our PCs. New to Sly Flourish? Start Here! Building Legendary Creatures in 5e

Creating a monster 5e