Legendary action for a homebrew boss
I am working on a campaign set in Eberron, and the BBEG is basically a Rakshasa (a la 2014 rules) who actually bothered with training and gathering magic items, and is planning to take over the island the campaign is set on (a la Sarevok). That means a little more spells to cast, a couple magic items that boosts its abilities, and most importantly, Legendary Actions !
There is one that I had in mind, that reflects how this BBEG is such a tyrant that they consider they should be the only one with the ability to cast spells.
So here is the thing I came up with :
Puny sorcery ! The Supreme Rakshasa targets a creature within 120 feet they can see. This creature must succeed a DD20 Intelligence saving throw. If they fail, they immediately lose a spell slot of the highest level they have, and if they succeed, they lose a level one spell slot.
I need to know what my fellow GMs think about this ability.