Spider Punk Spider-Punk is incredibly impressive for just two mana
You only really need to pull off one set of triggers to make it worthwhile
You can treat them as a perfect balance, or as one color tinged by the other, or as something more like Color A scaffolded with Color B. Rorschach, for instance, uses black methods to achieve white ends, whereas Machiavelli uses white methods to achieve black ends, and Harvey Dent/Two-Face from Batman simply switches back and forth between all-white and all-black.) UR Blue and red taken together are the colors of creativity
What counts as a ritual to you, and what are your favorite ones
Yes it extends the game by quite a lot
Think of things like Idyllic Tutor or Three Dreams, both tutors for specific card types that are over costed and way too narrow to have any sort of competitive Constructed impact