The target immediately becomes addicted to the drug used during the casting of the spell (see drugs and addiction). If the target was ever addicted to the drug at any point in the past, it takes a –4 penalty on its saving throw.
As scale spikes, except that the spikes growing out of the scales have an enhancement bonus on attack and damage rolls equal to +1 for every 4 caster levels (maximum +5). This bonus does not allow the spikes to bypass damage reduction aside from magic.
As black tentacles, except it creates a Large decapitated snake, which erupts from the ground and grapples a creature you specify within its 5-foot reach. As a standard action, you can command the snake to release its grappled target and direct it to attack a different creature.