At least one bonus symbol on reels 2, 3 and 4 awards 8 free spins.
Can award up to 128 free spins on single spin.
Free spins can be won during free spins.
During free spins Reel Surge is active changing reel dimensions to 3-6-6-6-3 to start.
Reel Surge can grow reels to 3-8-8-8-3 during free spins.
Reels change shape from spin to spin.
Triggered by at least one Koi Fish symbol on reels 2 and 3.
Reels can grow to a maximum of 3-8-8-8-3 for 4608 ways to win.