Eikas is a type of cryptocurrency.
Imagine you have a special toy that nobody else has, and people think it's really cool. They want to buy it from you, but you don't want to give it away. So you tell them they can pay you with eikas, which is like pretend money that only works in the eikas world.
People from all over the world can use eikas to buy and sell things with each other in the eikas world. And just like how real money can go up and down in value, the value of eikas can also change depending on how much people want it.
So if you have a lot of eikas, you can use it to buy other cool things in the eikas world. And if you don't have any eikas, you can use real money to buy some from other people who have extra.