How do the free spins in Book of Monsters work? Keep it simple.
Triggered by 4+ BONUS symbols (3+ with Ante Bet) or bought for 100x bet. 5-8 spins awarded. Selected FAT symbol (1x1 start) grows to 7x7 as FAT symbol instances are collected. Each size-up awards 1-3 extra spins. Gamble-for-level-up screen before round: upgrade FAT symbol tier or spin count, or collect and start.
RTP 96.50%High volatilitymax win ×5000demo ✓
From the verified capture of 15 Jun 2026 — not from the AI’s memory.