Yes, the activated ability lets you sneak your creatures onto the battlefield, while the triggered ability improves your scrying
A deck focused on aggressive strategies and utilizing poison counters would benefit from including Spinebiter, as its Infect ability can quickly weaken opponents and potentially lead to a win through poison counters
Vanilluxe evolves from Vanillish
For now, here's a look at the most expensive cards from both sets right now, based on what I've found
Its controller does get some card draw-based compensation though, in the form of one of the junk tokens, which look to feature heavily in this deck, and are much more useful than they sound
I am religiously following his tutorials and wonderful art videos