I have hard time finding use of them.
-On that asteroid only.
-Uses precious tree slot.
-Despite its limited use, it cost as same as dysontree
-Despite they are core of defence, they don't resist well
On top of that, if any of tree is destroyed, core is taken and
trees are gone.
Maybe separate defence attributes should be applied to asteroid
different from the seedling attributes?
They would find more use if bombs can travel to friendly asteroids
under attack within the reach of the jump radius/range. They leave the
trea and jump all the way up to the where there is the fight.
Plus, it would be good if bombs are released faster in general.
Also, making defencetree slot would be good too, instead of sharing
with dyson tree...