They are created by certain spells such as Battle Screech
Think of it like there only being one dungeon slot in your command zone
This uniquely powerful approach to counterspells is never going out of style
Early-Game Support (Dunsparce [SS] / [CES], Alolan Vulpix [GRI], Duraludon [RCL], etc.) Stable Draw Support (Zoroark-GX [SLG], Magcargo [DX] / [CES], Oranguru SUM, etc.) Instant Support (Crobat V [DAA], Mewtwo [UNB], Drizzile [SSH], etc.) Energy Accelerators (Blastoise [Base], Malamar [FLI], Moltres [CRE]) Evolving Pokmon (Magikarp, etc.) Attackers (Eternatus VMAX [DAA], Zoroark-GX [SLG], Mewtwo-EX [NXD]) Walls (Altaria [CHP], Wailord-EX [PRC], Chansey [Base]) Recovery (Munchlax [UNM], Starmie [EVO], Mewtwo [UNB]) Existing Results After you've looked at your format's card pool, its time to have a look at existing results, if there are any
Whats more, this wasnt even a normal card