A feature where a specific winning symbol leaves a wild in its 'trail' after disappearing, helping the chain reaction.

Symbol Trail Wilds is a feature where, under a cascading reels system, a specific symbol that disappears after a win leaves behind a wild symbol as a 'trail' in its place.

The core of this feature is to create a positive feedback loop, where the 'success' of a win doesn't just end there, but generates a powerful 'tool' (a wild) that can aid the next chain reaction.