[quote=Jerkchicken]
Level One: 5 etrasLevel Two: 3 etrasLevel Three: 4 etrasLevel Four: 3 etrasLevel Five: 5 etrasCould someone explain this better?So at level 1 I can have compartively weak etras and at level 5, five really awesome etras?
[/quote]

To my understanding, they stack. So, at level one, you have 5 arguably 'weak' Etras. As you level up, you gain more etras; At Level One: YOu have 5. At Level Two, You get 3 more that are a bit more powerful, meaning you have 8 in total, with 5 being basic and the 3 being a bit stronger, etc etc on and on.