Swizkii, also known as Seth Wisniewski, is a Canadian rapper and nerdcore creator. He is also a voice actor, YouTuber, and content creator who is best known in the rap battle community. He also runs his own rap battle web series titled Comic Book Rap Battles.

He previously went by the name Comic Book Rap Battles before rebranding himself as Swizkii. He also created a separate rap battle series titled Intense Rap Battles of Craziness, which he eventually discontinued.