ex evolutions booster box Mega Evolutions: (Non-Enhanced) (Case) – Black Wolf Collectibles LLC Pokemon of all types are putting everything on the line to become Mega Evolution Pokemon ex Pokemon ME1 Mega Evolution Enhanced

Lava Axe nixes 25% of an opponent's life total when they start at 20, but only 12.5% at 40

But most importantly they have this deck of oversized scheme cards: At the beginning of their first main phase, they flip over the top card of the scheme deck and do whatever it says

Whenever another artifact you control with mana value 3 or greater enters, create a 0/0 colorless Construct artifact creature token with This token gets +1/+1 for each artifact you control. Illustrated by Anton Solovianchyk Standard Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp

As far as I know the real source is known to WOTC and was shut down once before, reopening their business shortly after that under a new name