I want to create a simulation where there is a core and at these core objects are attracted to it gradually till they form the shape of the core e.g Sphere core like Chibaku Tensei. How can I achieve these, need help.
Here is one approach, there are probably better ones
Add the object you want to attract objects to and give it a force field
Set the strength of the field to a negative value. and the shape to "Surface"
Make it a passive rigid body
enable rigid body collision and set bounciness to 0 and friction to 1
Add the objects you want to move and give them a rigid body type of active
If you animate this the objects will move to the body and stick. You'll need to tune the force strength to get the speed you want.