It is one thing when a presumptuous prophet speaks and it does not come to pass:

Deuteronomy 18:22 When a prophet speaketh in the name of the LORD, if the thing follow not, nor come to pass, that is the thing which the LORD hath not spoken, but the prophet hath spoken it presumptuously: thou shalt not be afraid of him.

But, what about when an evil prophet speaks and the sign or wonder does come to pass?

Deuteronomy 13:1 If there arise among you a prophet, or a dreamer of dreams, and giveth thee a sign or a wonder,

  2 And the sign or the wonder come to pass, whereof he spake unto thee, saying, Let us go after other gods, which thou hast not known, and let us serve them;

  3 Thou shalt not hearken unto the words of that prophet, or that dreamer of dreams: for the LORD your God proveth you, to know whether ye love the LORD your God with all your heart and with all your soul.

When the false prophet calls down fire from heaven, similar to Elijah, will Deuteronomy 13:1-3 keep many in Israel from worshipping the beast?

Will line 5, then, be fulfilled when the false prophet is cast into the lake ofd fire, the second death?

Deuteronomy 13:5 And that prophet, or that dreamer of dreams, shall be put to death; because he hath spoken to turn you away from the LORD your God, which brought you out of the land of Egypt, and redeemed you out of the house of bondage, to thrust thee out of the way which the LORD thy God commanded thee to walk in. So shalt thou put the evil away from the midst of thee.