The Crimson Binome
Hero
If you get rid of the circumstantial prerequisites, and also make it a declared action on your turn (rather than a rider on other attacks), that should simplify the ability while retaining some semblance of balance and also curtailing off-turn shenanigans. (Or rather, for new players, it will avoid distracting them by setting up unreasonable expectations for off-turn exploits.)
The only reason I would suggest against doing so is if you are preparing them to transition more smoothly to other tables and you don't want them to learn about the fundamental cornerstone of D&D which is House Rules.
The only reason I would suggest against doing so is if you are preparing them to transition more smoothly to other tables and you don't want them to learn about the fundamental cornerstone of D&D which is House Rules.