pokemon cards that make your opponent discard Pokémon Card Database - Pitch Black Discard All of Your Opponent's

The joke is that an energy deck could easily cut black entirely, so there is a chance that my Aetherworks Marvel deck wouldn't even play Demon

Alibou, Ancient Witness corrects this by acting as a space laser fueled by artifacts

A true heavy pack must be unopened, show no signs of tampering, and preferably come from a trusted source with documented weight

Here's a good example from the most recent Pro Tour

Here, the most likely target is in Modern, where Collected Company has developed into one of the staples of the format, although it's also possible that Wizards had cards like Through the Breach, Show and Tell, or even some of the reanimation effects in Standard like Liliana, Death's Majesty or Rise from the Grave in mind while designing Mistcaller