20 The beast was taken, and with him the false prophet who worked the signs in his sight, with which he deceived those who had received the mark of the beast and those who worshiped his image. They two were thrown alive into the lake of fire that burns with sulfur.
and the beast was seized and with him the false prophet – this is similar to the seizure of the 850 false prophets after Elijah brought fire down from heaven (1 Kgs 18:40).
signs in his presence – the lying signs and wonders are brought to an end.
thrown into the lake of fire – a figurative ending.