pokemon x and y base set booster box XY: Packs Moon expansion. XY Base Set Booster Pack

It won't stop being saddled until the turn ends or it leaves the battlefield

I also like this in shells like Discard-Matters combining this with Megrim effects, Reanimation, Midrange that wants card advantage ETB triggers, Blink that wants to have ETB stuff to blink over and over again and +1/+1 Counters-Matter where this is a nice way to add counters onto an ETB body

Nope, it's all upside

But bonus sheet cards are supposed to be a glittering incentive to dive harder into a set, cracking more packs or buying the punishingly expensive collector boosters in exchange for unique, rethemed versions of existing, widely playable cards for your decks