An auxiliary script that returns the number of spell cards inside a range of IDs on the four standard difficulties.
Returns: Non-negative Integer
|_ENEMY_SPELL_GET_COUNT_R(ds, sidL, sidR, p)|
|ds||ds_map||The ds_map to read from.|
|sidL||Non-negative Integer||The identifier to start counting from.|
|sidR||Non-negative Integer||The identifier to stop counting at.|
|p||Reference to Object||The player meant to encounter the spells being counted.|