Thunder Birds Power Zones

Send your wins flying sky-high in this collapsing, cluster-pays slot. Spark 4 wins to charge a type of bird symbol, building and expanding Power Zones™ wherever that bird appears on the reels. If that symbol appears inside a zone, every bird in the zone transforms into it for a surge of wins. Trigger Free Games for even more excitement where every multiplier symbol boosts wins by up to 100×!