pokemon cards that you can buy Top 7 Pokémon Card Products to Each box comes with 50+ Pokemon cards and is GUARANTEED to come with 1 Ultra Rare and 5 Holo cards Pokemon Card 100 Random Pokemon

Not sure if such an effect for a permanent would immediately fit current Gruul builds in constructed formats, but the possibility for practical use is there

It's a Mana Drain in Light Played and a Eureka in Good

Even with the downside, the benefit you get from information and making them discard a key spell is worth the life loss, and control/combo decks hate to see a turn-1 Thoughtseize

The Ninth Doctor can do similar things if he can attack and untap on the next turn

Creating treasure tokens simply by casting instants and sorceries is a different take on cost reduction, offering you a rebate instead of outright lowering the cost