This is true. Of course, the ritual itself and the catalyst go hand-in-hand in a lot of cases. You would need something specific to successfully do such a ritual, though admittedly in the portrayal of the game itself, such things are glossed over outside of needing a specific card to set it off.

Though I'm talking as well about historical usage that might not be so noticeable, but it's why I'm trying to see what different catalysts are used, or could be thought of.