Rex became the leader of the Blood Spartan Tribe.
Once the Blood Ritual was over, under Clan Head Goku's order, the whole tribe went into a jubilatory mood to commemorate the transfer of power.
Ever since the inception of the Blood Spartan Tribe, there had only been 1 Clan Head, 1 Army Commander, and the 5 Generals who latter rose up after realizing their talents and becoming Super mystic warriors.
For the first time in centuries, this order was finally broken and not by the expected son of the Clan Head Zuko nor by a Super mystic warrior who was stronger than Clan Head Goku, but by the child of prophecy.
For a long time, after centuries of receiving no help or communication from their ancestors who sent them here, the vampires of the Blood Spartan Tribe already learned to remove their minds from home to prevent heartbreaks.