Rebirth
Zairin arrives and damages Bio-Tyranno, rendering it unable to use its Divine Thunder attack. However, Murasame Liger's Zoid Core is pierced and it stops moving. The group mount their final attack on Jiin, including Ra Kan, who has returned alive. Through Ruuji's will, his Zoid's Core is regenerated, and Murasame transforms into Mugen Liger to deliver the final blow to Bio-Tyranno's Zoid core.
Aired 26/03/2006EP 50 - Rebirth
Zoids Genesis
Natural disasters have devastated planet Zi, killing off almost all life. A thousand years later humans have gradually re-established civilization, salvaging ancient Zoids through diving and mining efforts. In a village whose most previous item is a giant sword which they worship as a holy symbol. A teenage boy discovers an ancient Liger-type Zoid while on a deep water salvage operation. Suddenly the village is attacked by skeletal Bio-Zoids intent on stealing a powerful generator located in the village. Our teenage hero awakens the Liger and discovers that the towns sacred sword is the Ligers weapon, together they fight off the mysterious Bio-Zoids. At least for now...
(Source: AniDB)