Founding Titan

The Titan that controls all other Titans and rewrites the memories and bodies of Eldians through the Paths. Its full power requires royal blood — or contact with someone who has it.

From the 145th king onwards, whoever inherits it with royal blood is bound by Karl Fritz's 'vow renouncing war'. Known holders: Karl Fritz and his successors, Uri Reiss, Frieda Reiss, Grisha Yeager (who is not of royal blood), Eren Yeager. Eren uses it with Zeke to unleash the Rumbling; its final form is a colossal skeleton as tall as a mountain.