Opens at level 90  There are two parts to Astrodisk and Astrocard.  Simplest way to think of this is: > Astrodisk - increase attack > Astrocard - increase def/hp Astrodisk As you can see there are 10 stars, to fill each star you will need a certain number of stones.    > The stones for astrodisk can be obtained from the gold shop or from beating levels 7-9 in Rise of the Machines. Once you have filled all 10 stars you will need astrodisk essence  once you start the upgrade for breakthrough you have 24hrs to complete the level or it will reset itself back to 0. > As far as I know this can be obtained from special events and gold shop Astrocard So in this case you can see instead of stars you get orbs to fill.  For this you will require constellation stones  > The Constellation Stones can be obtained from the gold shop or from beating levels 4-9 in Rise of the Machines. > Once you have filled all 10 orbs you will need Constellation Essence  once you start the upgrade for breakthrough you have 24hrs to complete the level or it will reset itself back to 0. > As far as I know this can be obtained from special events and gold shop   Other things to note > all astro items say you need to be level 100 to use them, but if you go through the menus you are able to use them anyway (a bug that probably needs fixing) > Stat bonuses affect the whole team, but the special skills under the stats only affect additional heroes, not your main char.