Rank-Up-Magic Cipher Ascension

During either player' Main Phase: Target 1 "Cipher" Xyz Monster you control; Special Summon from your Extra Deck, 1 "Cipher" Xyz Monster that is 1 Rank higher than that target, by using that target as the Xyz Material. (This Special Summon is treated as an Xyz Summon. Xyz Materials attached to that target also become Xyz Materials on the Summoned monster.) It gains this effect. - This card gains 500 ATK for each Level 4 or higher monster you control.