Well, another simple wave concept. This utilizes the mechanism quite similar to The Teleporter wave. This wave can be encountered at 45% difficulty and above, and the screen will be zoomed-out a little.
At the beginning, there will be 2 anomaly zones at both sides of the screen.
Three indestructible barrier balls will then show up at the middle horizontal line.
Enemies will appear randomly at any of three positions marked by the barrier balls. Example for the second one, there will be a red effect at the 2nd barrier balls lasting for a short duration.
Enemies will suddenly appear like how they show up in The Teleporter wave. Right after that, 3 barrier balls will disappear immediately.
Another example for the third position:
There will be 3 sub-waves in this wave, the next sub-wave will happen if all enemies in the previous one are destroyed (That means this procedure will be repeated 3 times).
Thanks for reading!!