I'm building a ghostwise halfling monk of long death and was thinking about the following feature:
Touch of Death
At 3rd level, when you reduce a creature within 5ft of you to 0 hit points, you gain temporary hit points equal to your Wisdom modifier + your monk level (minimum of 1 temporary hit point).
Is it legal to kind of 'whack a mole' some monster... say a goblin? In other words, knock it out to 0 hp, stabilize it back to 1, hit it again, rinse and repeat to stack loads of temporary hit points?