Pentagon

Pentagons are blue passive shapes with five sides. They have 20 health and give between 100 and 300 experience. There are numerous variants of pentagons, all much stronger. The Pentagon Sanctuary protects pentagons and spawns a Leviathan when killed.

History
The Pentagon is present in Diep.io, Arras.io and Woomy Arras.io. It is an original shape. Beta Pentagons are present in Arras.io. Green Pentagons were added on 28 May 2018. On 16 September 2018, Green Beta Pentagons were added. Sunburnt pentagons even exist, with a picture of one:

Pentamancers were added on 7 September 2019, and are able to infect any type of pentagon, including Burnt, Beta, and even Alpha Pentagons.

Design
Pentagons are blue equilateral pentagons.

Technical
Pentagons have about 20 health and give between 100 and 300 experience.

Sanctuary
The Pentagon Sanctuary is a five-sided entity that spawns many giant pentagons and generates a nest around it. The nest can include Green Pentagons, Sentries, and Crushers. When destroyed, a Leviathan will spawn to avenge it. The Pentagon Sanctuary is the rarest regular sanctuary.