The Community in more languages
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I like using the rainbow rush to clear black scowling rocks or mocking orange pumpkins or green leaves on the levels that get really full of these pesky progress blockers since the booster works on those as easily as the red, blue, yellow, and green bubbles. I cannot remember if it works on the white color changers or not.
I sometimes trip myself up by watching an ad to get a random booster at the beginning of a round then it turns out to totally be the opposite of helpful to start the round with. Say for instance, there's a 5 point bonus bubble I want to pop but the random generator gives me a booster spell that won't reach it however one of my 2 bubbles of choice in the shooter would be perfect. Can't get to them until I use the random booster bonus shot bubble though so my point bonus bubble drops to 4 before I can pop it. Frustrating but I love the challenge. (And isn't that why we all play?)
Often as not though, the random generator spins out a helpful booster spell and I always look forward to seeing what is generated! - little gambler me. ;-)
I have seen that some of the special bubbles already on the giant part of bubbles have something weird: Some of them have similarities to the other spells. The Arcane Bubbles burst surrounding bubbles in a similarity to Sparkling Blast. The Line Blast Bubbles have a similarity to Stereo Bolt. The Fairy Nest has a similarity to Rainbow Rush, and the release captive fairies thing has a similarity to Shooting Star. They usually only take down 1 bubble, but can take down an entire group of bubbles. Note: This rule will not apply if it is a special bubble (like Black Bubbles).