Triggered by specific symbols, winning symbols fade away, and new symbols show up, providing more chances to win from a single spin.
http://biopharmamash.com/viewtopic.php?t=1431591
http://forum.ruchkontroliwyborow.pl/index.php?topic=12990.new#new
http://forum.bandingklub.cz/viewtopic.php?f=16&t=1457380
https://www.ww2.site/forum/viewtopic.php?p=37513#p37513
https://gravatar.com/zestful162cc7c219
http://qrfonline.qrfmag.com/qrfswap/viewtopic.php?t=160865
https://forum.pcfoster.pl/topic/109246-hoe-zoek-je-aanbiedingen-met-minimale-omspeleisen-casino-online-betrouwbaar/
https://www.chargersixpackforum.com/forum/threads/hogyan-lehet-nagy-p%C3%A9nzt-nyerni-az-online-kaszin%C3%B3kban-dominos-nyer%C5%91g%C3%A9pes-online-j%C3%A1t%C3%A9kok.83579/
https://forumlylife.com/showthread.php?tid=7221
https://talkingpoints.org/subx/showthread.php?tid=18617
https://www.ww2.site/forum/viewtopic.php?t=113836
http://www.lada-xray.net/showthread.php?p=207217#post207217