Boosters can be fatal
Every booster has a chance to be too much for your fighter — and if the roll goes badly, that fighter is lost for good. This is the riskiest choice in the game. You'll always be asked to confirm first.
Guide 6 · Going Further
Boosters
Boosters are powerful potions that make a fighter stronger right now — no waiting, no training. But that power comes with a real cost, and a real risk. Use them wisely.
Two kinds of booster
💪 Stat Boosters
Big instant stat boost −20% happiness 1-in-5 chance of death
There's one for each stat — Strength, Mind, Toughness, Speed, Aim, and Luck. It injects a big chunk of training into that stat instantly. Great for rushing a fighter to power, but it upsets them and carries a 20% chance of a fatal accident.
⏳ Age Booster
+1 day older −20% happiness 1-in-10 chance of death
Ages a fighter up by one day so it grows up faster — handy for reaching breeding age. It's a bit safer than stat boosters, with a 10% chance of a fatal accident, but it still upsets your fighter.
When are they worth it?
✅ Good moments
On a spare fighter you can afford to lose, or to push a strong bird past a wall right before a big event or breeding.
🤔 Think twice
On your favorite champion. One bad roll and they're gone — sometimes patience and crops are the safer path.
❤️ Mind the mood
Boosters drop happiness a lot. Pat and feed favorites afterward so your fighter doesn't get unhappy enough to leave.
Test before you risk
Not sure a booster is worth it? Use the Battle Simulator to see how much stronger your fighter would be first — no risk, no cost.