Complex sentence: It was this victory that brought into his family Oroku Saki (Shredder), the child of the Foot Clan's leader, and together, both were raised in the Hamato Clan as brothers, maintaining an intense but healthy competition in their ninja training.
Split into simpler sentences: It was this victory that brought into his family Oroku Saki (Shredder), the child of the Foot Clan's leader. Together, they were raised as brothers, and maintained an intense but healthy competition in their ninja training.