after events of Sonic forces, The gang manage to destroy all phantom Rubies to make sure eggman doesn't use it to created even dangerous than His previous"almost succeded" plan if wanst for the Rookie. but G.U.N. manage to collect the remaining 7 phantom Rubies for there own experiment but the general still hates Shadow from the incident of the Ark plans to created a new weapon to kill him and to protect the innocent.. iBY USING THE CORPSE OF Y/N THE HEDGEHOG! the doctors transfer the 7 phantom Rubies at His body to absorb it's power, Wanna know result?: they created the deadliest lifeform who surpass anyone which Also murder the G.U.N members and almost the general. " my name Is Y/n the hedgehog, i am the deadliest lifeform...and this...Is my story"