Hearts (Universe Seed)'s History
Hearts is the leader of the Core Area Warriors, a collection of individuals whose goal is to destroy Zeno. He is the main antagonist of the Universal Conflict Saga.
Prison Planet Saga
Hearts along with the other members of the Core Area Warriors make an appearance after the chains surrounding the Prison Planet have broken and the planet is on the verge of destruction. After Fused Zamasu retrieves Cumber's unconscious body, Hearts and the others teleport away.
Universal Conflict Saga
Hearts appears along with Fused Zamasu and watches his allies, Oren and Kamin, battle against Vegeta and Future Trunks. Hearts tells Zamasu that they hadn't planned on dealing with those from Universe 7 until a later time and asks him to refrain from getting involved until after Zeno has been defeated. He then travels to Universe 6 along with Zamasu and unannounced to all on the battlefield, he attacks the Saiyans and Hit with a gravitational force that pins everyone to the ground. He tells Vegeta that he is the man that will take down Zeno and will use the Universe Seed to do so along with taking down the Gods of Destruction and the Supreme Kai.
In a display of power he creates a large transparent cube which he sends upwards into space and around a nearby planet before shrinking the cube to destroy it. He then creates additional cubes and places them above the Saiyans and Hit, ready to do the same to them but Oren and Kamin tell Hearts that they were in the middle of having fun fighting them causing Hearts to halt his attack. Hearts suggests heading towards the next Universe and asks Zamasu to come along with him though Zamasu tells Hearts not to order him around. Spotting Hit, Hearts asks him who is the strongest being in all of the Universes. Though Hit does not answer, Hearts is able to read his mind and determine that the answer is Jiren and decide to head to his Universe.
Hearts, having previously sent Cumber to try and deal with Jiren, notices his failure and increases the gravity on the Pride Trooper to stall him from attacking Cumber before teleporting the ancient Saiyan away to Universe 3. He then sends Oren, Kamin, and Fused Zamasu to attack, however, they fail to do any real damage. Later, Hearts makes note of Goku's arrival and wonders if he has become a true god after seeing his power. Hearts calls out to Rags as he wishes to use her power and she soon appears surrounded by a barrier of pointed glass. Using his powers, Hearts sends the pointed end of the barrier towards Goku though he is able to destroy it thanks to his might in his Ultra Instinct -Sign- state.
Soon after Rags battle with Goku and Trunks, Hearts tells her to move on to assist Cumber in Universe 3 as only she can do so. Hearts reads Goku's mind and notices that his previous Ultra Instinct -Sign- state was imperfected and vows to draw out it's real power. Goku charges at Hearts but using his Gravity Burst, he pins Goku, Trunks and Vegeta to the ground with ease. After Shin appears on the battlefield and Goku teleports everyone away, Hearts makes plans to head for their next destination now that they have gathered enough energy from Universe 11. Jiren attempts to stop him but Hearts traps him in an Energy Cube to immobilize him.
Hearts and his allies head to Universe 7 where they confront the Dragon Team once more. Goku targets Hearts and rushes at him but Hearts repeatedly slams him to the ground using his Gravity Burst technique. When the Universe Seed begins to shine, Hearts removes his jacket and powers himself up, entering into a stronger state before saying that the Universe Seed will soon be complete.
Hearts and Goku begin fighting and he forces Goku back with a barrage of punches. With little choice, Goku becomes a Super Saiyan Blue which makes the fight more evenly matched though the two acknowledge that neither is using their full power. When the fight commences again, Goku begins to gain an advantage and overwhelms Hearts with a Kamehameha. However Hearts stands up and taunts Goku before using his Gravity powers on him. When Hearts uses his Gravity Fist technique, Goku is at a disadvantage as Hearts begins to power up further. Drawing the energy cubes towards himself, he charges at Goku and knocks him hard to the ground which causes him to fall out of Super Saiyan Blue. Hearts continues to torture and mock Goku, asking him if he can make the fight more exciting.
His attention is turned away to notice that Kamioren is being overpowered and decides to give them more power. Using his energy cubes, he shrinks down the Universe Seed and has it merge with Kamioren which causes them to significantly power up and grow to giant size. Hearts watches as Goku fights Kamioren and transforms into his Autonomous Ultra Instinct form, commenting that Goku has the power of a God. After Goku kills Kamioren, Hearts summons the Universe Seed towards him, saying that it is now in it's completed state. Saying that Kamin and Oren's death will not be in vain, Hearts joins with the Universe Seed as a swarm of his energy cubes begin to draw towards him.
Once fully fused with the Universe Seed, he is reborn as the Ultimate Godslayer. His first action is to disintegrate Fused Zamasu within an Energy Cube, putting the Kai's intentions to continue Project Zero Mortals to a destructive end, as Hearts wishes to destroy the gods, Zamasu is his first victim. He then demonstrates his power further by completely demolishing the city below. As he turns his attention to the others, he uses the green orbs behind his back to attack them, zooming through the air as they encircle and enclose everyone into a limited space.
Ultimate Hearts dominates Goku, Vegeta, Future Trunks, Piccolo, Android 17, Jiren and Hit, taking them all down with a single blow. Even the duo of the two warriors coming from Universes 6 and 11 are pushed back, as well as Super Saiyan Blue Goku. After using the Gravity Finale technique that puts everyone down once again, Goku proposes to Vegeta to fuse since he does not know when he will be able to use Ultra Instinct again. The prince of the Saiyans accepts after a few seconds of refusal while the other warriors hold Hearts off long enough to buy them some time. Upon Gogeta confronting him, Hearts laughs at the fusion for thinking they have a chance at victory, while Gogeta voices his desire to have some fun with the imminent showdown.
Hearts laughs off the idea of Gogeta and tells the others that they are in the way, easily taking them out with his Green Orbs. As Gogeta turns into a Super Saiyan Blue and approaches Hearts, the two begin fighting and Gogeta quickly establishes an upper hand in strength. In turn, Hearts powers up even further but he is not able to land an attack on his opponent. Impressed by Gogeta's power, Hearts asks Gogeta to join him in his goal to kill Zeno for mortal freedom but Gogeta refuses his offer. Hearts then summons a God Meteor into Earth's atmosphere and amplifies it with his power. Immobilizing everyone else on the ground below, Hearts begins to send it crashing into them with only Gogeta standing in its way.
Surprisingly enough, the fused warrior is able to hold back the meteor with a blast of his own, forcing Hearts to greatly empower his own attack to cause Gogeta to draw out more of his power in the form of an Ultimate Kamehameha. All seems to be at a standstill between the two warriors, until Hit and Jiren arrive to add their energy to Gogeta's Kamehameha, drastically increasing its power to the point where it crashes straight through the God Meteor and destroys it, leaving the other Z Fighters to blast the rubble. As Gogeta rushes him, Hearts questions if his fusees even had limits to begin with before powering up and charging. Both warriors land a hard punch to each other's face, Gogeta's causing Hearts's visor to shatter. Furious, the Godslayer tries to deal another blow to the fusion before Gogeta evades the punch and smashes his fist into the Universe Seed on Hearts's chest, blasting his divine energy straight through him and defeating him once and for all.
As Hearts begins to fade, he smiles and reveals his true intentions for acquiring the Universe Seed to Gogeta - to liberate the world from the lack of freedom inadvertently enforced by Zeno's ability to wipe out universes with a single thought. He further reveals that it was through people like Goku and Vegeta and their limit-breaking power that Hearts found an appreciation for mortals, and with that final declaration, his body and the Universe Seed dissipate into light.
Universe Creation Saga
The deceased Hearts is shown in Hell, smiling in his cell before he is located by Demigra.