They attack opponents and block incoming threats
If you play in a higher-powered meta you might look at adding in Conqueror's Flail so that your tablemates are "locked out" of casting spells on your turn
A notable strategy involves using it in combination with Kaalia of the Vast Commander decks, where you can put Avacyn into play without paying its mana cost, immediately providing indestructibility to all your permanents
Lastly, the music is serviceable, but extremely repetitive after a while, and I ended up muting it and playing my own playlist over matches
I usually tape the dividers up to try to make them smooth so I dont damage my cards, but its probably unnecessary
By going for all 5, you have a 97% chance of getting at least one card, so you might as well go for broke as often as possible