Ultimate Omnitrix! Mix and match! 35 interchangeable pieces! The Legacy Omnitrix is the ultimate set for the Ben 10 fan. Use the Legacy Omnitrix to mix and match parts to create a one-of-a-kind Omnitrix. Includes 35 interchangeable pieces to create over a thousand possible combinations. Comes with parts from the Omnitrix FX, Ultimate Omnitrix, and Disc Alien Ultimatrix.