Use the in-game replay system to watch your losses. Look for moments where you overcommitted mana or missed a bridge flip. The best players lose to learn, not to rage.
Minion Masters uses a server-authoritative model. This means critical data like your mana count, card cooldowns, and currency (Rubies and Shards) are stored and calculated on the game's servers, not your local device. If a local "hack" tries to give you 99 mana, the server will immediately detect the discrepancy and kick or ban you from the session. Minion Masters Hack