# Ai Tanks
The Ai dance is complex and without possibility of error, which is why specially prepared Tanks are needed. All reproduction must take place in Ai Tanks, a place where two koins can be sent to perform the dance and will remain for the duration of the ritual.
Ai Tanks are rare NFTs with very limited availability. Should you become an owner of an Ai Tank, you’ll be able to designate and rent out a space within it, in exchange for utility token. A small percentage of this amount is burned.
Ai Tanks allow a limited number of koin pairs, although it is possible to increase this number by purchasing upgrades through utility token.
Once a koinie is born in one of the slots, it will remain occupied for 5 full days.
There are only 100 units of Ai Tanks. They will have one slot available to perform the dance. The slots can be expanded through Decorations.
Decorations are NFT pieces that can be equipped to Ai Tanks to improve it in various ways, such as expanding or optimizing it.
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