Most Players Make This Deck-building MISTAKE | Union Arena Deckbuilding Guide | Union Arena TCG

In this Union Arena Deckbuilding Guide, we break down the #1 mistake most players make when building their decks and how it silently kills consistency, tempo, and win rate. Whether you’re prepping for locals, regionals, or just trying to level up your gameplay, this video will help you identify common deckbuilding traps, understand why certain card ratios fail, build more consistent, competitive decks, and stop copying lists blindly to adapt them properly. This guide is perfect for new players, competitive grinders, and anyone who wants to stop bricking and start winning more games. Timestamps: 00:00 - Intro 02:41 - Precursor 05:15 - First Steps 08:02 - Rules of Thumb 29:52 - Playstyle vs Preference 37:47 - Consistency vs Highroll 50:08 - Final Touches