When it enters the battlefield, all creatures get +X/+X, where X is the number of creatures you control, including itself, as well as trample
Of course, youll want plenty of spiders to go with Shelob
Lore-wise, there is almost an internal power struggle to determine which one is more important, but when it comes to the cards, you're going to be balancing a life gain and sacrifice strategy
A 5/5 with flying that enters with shield counters can also remove counters from creatures and Planeswalkers you control to draw a card and make a citizen token
Tea Time at the Jasmine Dragon Avatar: The Last Airbender Everyone relaxes and enjoys Tea Time at the Jasmine Dragon
In addition, those copies are 4/4 Black Zombies with Vigilance meaning you have solid offensive and defensive capabilities