Community Support: Building and supporting the Spanish One Piece TCG player community
Before OTJ, EDHREC showed players jamming it into around 95,000 decks
These filler cards are quite rare, and few of them escape from the manufacturer
This is more accessible than most CCGs so you should be good, it was designed with kids in mind after all

Abominable Treefolk Ambassador Oak Ancient Lumberknot Ancient of the Equinox Argothian Treefolk Battlewand Oak Black Oak of Odunos Black Poplar Shaman Blanchwood Treefolk Blighted Blackthorn Bog-Strider Ash Bosk Banneret Burlfist Oak Canker Abomination Cloudcrown Oak Colfenor, the Last Yew Crabapple Cohort Cradle Guard Dauntless Dourbark Deadwood Treefolk Doran, Besieged by Time Doran, the Siege Tower Dungrove Elder Ebony Treefolk Enraged Huorn Everbark Shaman Ezzaroot Channeler Faeburrow Elder Fangorn, Tree Shepherd Fendeep Summoner Ferrafor, Young Yew Flora Colossus Flowering Lumberknot Foxfire Oak Gaea's Avenger Generous Ent Ghastbark Twins Ghoultree Gnarlbark Elm Gnarled Grovestrider Gnarled Professor Gnarled Sage Gnarlroot Pallbearer Great Forest Druid Great Oak Guardian Guardian of Cloverdell Harold and Bob, First Numens Heartwood Storyteller Heartwood Treefolk Herbology Instructor Indomitable Ancients Ironroot Treefolk Ironroot Warlord Kalonian Twingrove Kurbis, Harvest Celebrant Leaf-Crowned Elder Lignify Lumberknot Magnigoth Sentry Magnigoth Treefolk Malady Invoker Mirrorwood Treefolk Moonlit Lamenter Mossbeard Ancient Nemata, Grove Guardian Nemata, Primeval Warden Oaken Brawler Oakgnarl Warrior Old Ghastbark Old Man Willow Old-Growth Educator Orchard Strider

Merfolk has a couple key cards that provide the incremental advantage