pokemon cards instock Card Game 151 Japanese Booster Box Sealed (SV2A) – Pacific Collect's Onix - 070/132 - Common

That said, elf decks have some weaknesses

Cards like the 1st Edition Cubone have dramatically increased in value, while other cards from the earliest days of the Pokemon TCG are also seeing incredible increases

Atraxa, Praetors' Voice is capable of carrying games at any level of play with the right deck

LF - Extreme Ascent 70x You may discard any amount of Basic Energy attached to your Pokmon in play

Patient Zero and Uthgardt Fury play within similar design space by preventing damage from being naturally removed, allowing it to stack up and kill off creatures over time

I once ran a Norin the Wary deck that focused on these kinds of effects, and this looks very similar to me in the way you can make use of it