Trigger

Trigger, also refered as Weak Quirk Improvement Drug, is a type of drug that gives a boost to a individual's Quirk, simutaneously weakening their sense of reason. Trigger addicts suffer a side-effect after the use that changes their tongues color to black.

Canon

 * An unnamed villain amplifies his Blades, sprouting great number of very long blades from his body. He is capable of controlling them, sprouting and retracting them, as well as focusing them in one place to reach great destructive power. They become sharp enough to nick Kirishima's Hardening.
 * Joi Irinaka of the Eight Precepts of Death amplifies his Mimicry, allowing him to affect much larger than the physical area of a refrigerator, his normal limit, and to merge with and manipulate an entire underground facility in preparation for the Heroes' invasion.

Non-Canon

 * Raputo Tokage amplifies his lizard appearance to a strong Pterodon Physiology Quirk.
 * Moyuru Touchi, who only appeared to have a small flame in place of his hair, is amplified to become a powerful flaming rock golem.
 * Souga Kugizaki amplifies his Spike to a Porcupine Physiology Quirk, that sprouts stronger spikes all over his body.
 * Mario Kugutsu is transformed into a massive four-armed giant.
 * Akira Iwakou, whose Quirk was amplified to a Hardening transformation-type Quirk, with additional Enlargement and Super Strength abilities.
 * Teruo Unagisawa, whose unrevealed Quirk was amplified to make him a large, eel-like creature, whose skin was capable of secreting slippery slime. He also had greatly enhanced mobility, being able to bounce off the walls of buildings to launch himself into the air and even keep up with Pop Step's Leap. His mouth was also filled with numerous sharp teeth, somewhat resembling a leech.
 * Quinn Hachisuka, while not a user herself, utilizes her Quirk as a specialized delivery system. Infecting dozens of Quirk using citizens in order to effectively test drive trigger's potency while in use.
 * An unnamed civilian from Chapter 5 (Illegals), who was amplified to gain blades on his fingers and shoulders, as well as Muscle Enhancement and Enlargement.
 * An unnamed civilian from Chapter 5 (Illegals), who was amplified to release electricity from her eyes.
 * An unnamed civilian from Chapter 5 (Illegals), who was amplified to release black fluid from his palms.
 * An unnamed civilian from Chapter 5 (Illegals), who was amplified to catch on fire.
 * An unnamed civilian from Chapter 5 (Illegals), who was amplified to become very large and round, with dark skin and lighter markings. His body also released streams of water from several points.