The elemental incarnations, and the Theros titans (such as the recent Phlage, Titan of Fire's Fury), have triggered abilities that cause them to be sacrificed after they enter the battlefield unless they've been cast a particular way
Its like how sometimes Affinity can equip a Cranial Plating before Stony Silence hits play, but usually the hate card means game over
Damaged cards show wear or imperfections beyond the standards for other conditions
Heck, Im using Mirkwood Bats in about 12 decks right now, between Food decks, Treasure decks, aristocrat decks, and even Mardu token decks like Zurgo and Caesar
Its especially good for cards that shine under close inspection , like clean holos, playable staples, and mid-to-high-value rares
Like other Pokmon TCG products, Battle Academy includes a code card for the digital version of the game, which lets players redeem virtual versions of all three decks