Instantaneous
Definition: (adj.) Done in an instant; Immediate
Synonyms: Prompt, Quick, Speedy
Antonyms: Delayed, Slow, Gradual
The wizard's magic was so instantaneous that it took only a matter of seconds.
http://www.bite.ca/bitedaily/2012/08/anatomy-of-a-wizard/people_cartoon_wizard_in_sorcerers_robe_and_a_magic_wand_0521-1010-2714-0148_smu-2/