Like most Pokmon cards, the value of Kingler depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Great Encounters)
I remember Autochthon Wurm being a go-wide tech some 10-15 years ago
Highlights the return of popular Pokemon and introduces new Mega Evolution ex cards, including some with exclusive artwork
Ancient Gear Gadjiltron Dragon - SR03-EN004 - Common - 1st Edition Available, 1 In stock Details Passcode: 50933533 ATK/DEF: 3000 / 2000 Card Number: SR03-EN004 Monster Type: Machine / Effect Rarity: Common Attribute: EARTH Card Text: If this card attacks, your opponent cannot activate any Spell/Trap Cards until the end of the Damage Step
At the top of this category, we have the out and out cheapest answers that deal with the most permanents
One thing he notes is that players don't like seeing cards that they aren't able to play somehow, whether they discard those cards themselves or have them taken from them