He doesn’t actually know that ritual, though. Quirrell does stuff with his wand and Harry knows better than to just blindly copy whatever off his memory.
The resurrection ritual, as near as I can tell, requires only going to that obelisk, placing flesh on the slab, and saying “X, X, X so wisely hidden”, where “X” is whatever you you have—blood, flesh, bone, vitreous humors of the eye, whatever.
A reasonably non-dark way of making people nigh-immortal, though he might have to leave out the troll part if they turn out to be sapient.
He hasn’t actually learned the magic Voldemort was using just by observing it. And it’s likely a Dark secret that noone else can teach him.
He doesn’t actually know that ritual, though. Quirrell does stuff with his wand and Harry knows better than to just blindly copy whatever off his memory.
The resurrection ritual, as near as I can tell, requires only going to that obelisk, placing flesh on the slab, and saying “X, X, X so wisely hidden”, where “X” is whatever you you have—blood, flesh, bone, vitreous humors of the eye, whatever.