It's a somewhat demanding deck that will require you to plan your Challengers well and save valuable resources for the right moment, but it's also a fun deck that can be made much stronger very easily by swapping in a few more Evasive cards, like Genie, On the Job and Goofy, Daredevil
Den Protector is no different, and like some previous cards in the Top Five, also really dominated Standard when it as rocking the block
That said, the card doesnt technically draw cards (neither does Bolass Citadel, but that card doesnt really need support to work)
Like Ursula, Jafars Ability adds some real appeal to this card
In Magic: The Gathering, the Gruul color alignment of green and red is known for its powerful creatures, harsh burn spells and excessive mana ramp