As this artifact enters, you may have it become a copy of any creature on the battlefield until end of turn, except it has haste
These tokens can then be used to win in one of several ways: First, the deck features several cards that will do direct damage to your opponents when you sacrifice permanents (Marionette Master, Disciple of the Vault, Mayhem Devil, Reckless Firewheeler, etc)
Cards like Dina, Soul Steeper really accelerate the damage output with Slimefoot and serve as a sacrifice outlet for the saprolings if you want to force the action
You can Wasteland a foe's land and then use it yourself
Its a great way to immediately bring yourself up to speed and Amber & Emerald does so in a way thats slightly friendlier than the other Into the Inklands starter deck
Unlike regular Set Boosters, Aftermaths Epilogue Boosters is a five-card pack, which makes sense, given that the whole set is only made up of 50 cards