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"Cold Stone" is a fantasy adventure anime about traveling between dimensions. The story follows Varg, a powerful warrior who can jump through worlds. While in peak physical shape, his power has a hidden cost: each jump slowly turns his heart to stone. To survive, he must reach the Primordial Core at the center of the universe. He is accompanied by Sila, a mute girl whose silence is actually a seal holding back a voice that can destroy worlds. Chasing them is General Olaf, a cosmic protector who believes Varg will sacrifice other realms just to cure himself. Spanning four seasons, it is an emotional, high-stakes story about the cost of survival.