This explains the bring mechanic. You need 1 dynamic object.
Aim and fire the red beacon at the dynamic object.
If the red beacon hits a dynamic object, it will become marked, just like the blue beacon. Similarly, nothing will be marked if you hit a wall. One object can be marked at a time.
Now, with the object marked, you can summon it under you. Even if the red object moves, it will still be marked. You can use this ability to place cubes where you want them (for example on a door switch, above an enemy...) You could also build stacks of objects quickly(we will see this in detail in part 3).