an attack to recurrence ability because resources are not infinite.
Try creating an "infinite loop" AT - I'll even give you the machine code for that here:
Code:
1A000000
Now see what damage you can do with it.
(hint - you can't do any more damage with that than any other sort of DoS type of attack on the network as ATs work like "transactions" with funds needed to run them and fixed limits as to how many steps can be run per block)