"or a dreamer of dreams": Because it is said of Moses (Bamidbar 12:8) "Mouth to mouth I speak to him," I might think that all prophets must possess this attribute; it is, therefore, written "or a dreamer of dreams."
"and he shall give to you a sign": in the heavens, viz. (of the sun and the moon, Bereshith 1:14) "and they shall serve as signs and times,"
(Devarim, Ibid.) "or a wonder": in the land, (viz. II Chronicles 32:31) "to inquire concerning the wonder that was in the land."
(Devarim 13:3) "And there shall materialize the sign and the wonder of which he spoke to you, etc.": R. Yossi Haglili said: See how far Scripture penetrated to the ends of the psyche of the idolators and gave them dominion — Even if they cause sun and moon, stars and constellation, to stand still, pay them no heed. Why? (Ibid. 4) "For the L-rd your G-d is trying you to know whether you love the L-rd your G-d, etc."