“And I beheld another beast coming up out of the earth; and he had two horns like a lamb, and he spake as a dragon.” (Rev 13:11 KJV)
This beast is the false prophet. He works hand-in-hand with the antichrist to persecute the saints and persuades the world to worship the beast. Coming up out of the earth refers to the earthly system, which could refer to government, religion, or both. The two horns probably refer to his deceptive nature. He will be a ruler as indicated by him speaking like a dragon.
“And I saw three unclean spirits like frogs come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet.” (Rev 16:13 KJV)
“And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone.” (Rev 19:20 KJV)
“And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.” (Rev 20:10 KJV)