Sonic the Hedgehog #87 — Sonic Scribes

""Heart of the Hedgehog - Part 2": The heat is on - literally, as Sonic desperately tries to save Tails, trapped inside the rim of a volcano by the menacing Metal Sonic. Rescuing his little buddy will be harder than usual - the new, sentient version of Metal Sonic knows no limits in his hatred of Sonic, and will stop at nothing to ruin his world. He's faster and stronger than before."