Actually, to add a question, what stops a character from researching this "ritual" separately from the feat:
Discovering Occult Rituals
The mysteries of occult rituals are jealously guarded secrets, often painstakingly obscured by a ritual's originators or those who stumbled upon the obscure formulae detailing it.
The particulars of casting occult rituals are hidden within coded tomes, concealed in puzzles, or referenced only through allusions woven into esoteric tales. Recovering the casting method of an occult ritual can be an adventure within itself, something revealed by hallucinatory visions, coerced from an occult practitioner, or passed on by a true initiate hovering at death's door and wishing for his genius to live beyond his mortal existence.
If an occult ritual is taught or its secrets are explained directly, it takes at least 1 day per ritual level to learn the method of its casting. Learning a ritual from hidden clues or from scratch takes a week or a month per ritual level (GM's discretion). At the end of this period of study and contemplation, the person attempting to learn the ritual must succeed at an Intelligence check (DC = 15 + the ritual level if learning from clues or a coerced teacher, or DC = 10 + the ritual level if learning from an instructor eager to teach) . Failing the check means the secrets of the ritual elude the learner's understanding, though she can start the process anew at the same rate of potential discovery.
it's a 4th level ritual; a DC 19 int check just isn't that hard...