undaunted booster box HS Pokémon Pack Secret Rare cards are included at an increased rate My Hero Academia: Undaunted Raid

Ability: Explosive Energy Once during your turn, you may search your deck for up to 5 Basic [G] Energy cards and attach them to your Pokemon in any way you like

Because collectors are more likely to keep opening those packs to find their chase cards, which gradually reduces the number of sealed boxes left in the world

I think this is the one filler Id want to own out of all of them

He cares about base power/toughness 0/0 creatures hitting opponents and rewards you with new 0/0s with the +1/+1 counters on it equal to the damage they dealt

For example, some have the illustration cover the entire card, some have a finish that makes it shine, while some have special processing to give it a textured feel