The Alpha Decagon is supposedly a re-work of a removed Decagon, with changed color. It was supposedly added in late 2019. On September 27, 2019, it's health was nerfed. As of October 19, 2020, Led Zeppelin is no longer able to push these.
The Alpha Decagon is a large white decagon that is about as large as an Alpha Pentagon.
The Alpha Decagon has 600 health and gives about 35000 experience upon destruction. It can only evolve from Alpha Nonagon in the pentagon nest, and cannot evolve further. Alpha Decagon has higher resistance compared to Alpha Nonagon, that's why it is noticeably harder to kill.
If you have reached the highest tier and have a high DPS, like Splitter, you can destroy Alpha Decagon for its experience. As a tanks with lower tiers, you will unlikely be able to destroy Alpha Decagon without wasting too much time. You can also use Alpha Decagon in defensive purposes against Bots, if you are unable to defend by yourself. In this case, you can move behind Alpha Decagon and trick bot into ramming Alpha Decagon and taking massive damage. This will force the bot to retreat.
|Simple Shapes||Egg • Square • Triangle • Pentagon • Beta Pentagon|
|Splitter Shapes||Splitter Square • Supersplitter Square • Splitter Pentagon • Splitter Hexagon • Splitter Decagon|
|Green Shapes||Green Square • Green Triangle • Green Pentagon • Green Beta Pentagon|
|Orange Shapes||Orange Square • Orange Triangle • Orange Pentagon|
|Golden Shapes||Golden Egg • Golden Nonagon • Golden Icosagon|
|Alpha Shapes||Alpha Pentagon • Alpha Hexagon • Alpha Heptagon • Alpha Octagon • Alpha Nonagon • Alpha Decagon|
|Sanctuary Spawned Shapes||Giant Egg • Giant Square • Giant Triangle • Giant Pentagon • Bowed Sanctuary Square • Snowball|
|Removed||Hexagon • Heptagon • Octagon • Nonagon • Decagon • Icosagon|
|Normal||Egg Sanctuary • Square Sanctuary • Triangle Sanctuary • Pentagon Sanctuary • Golden Sanctuary • Crasher Sanctuary • Bowed Sanctuary • Snowball Sanctuary|