Target 1 face-up Xyz Monster you control; Special Summon 3 "Umbral Horror Mirage Tokens" (Fiend-Type/DARK/Level 1/ATK ?/DEF 0). They have the same ATK as that target. They cannot attack directly and cannot be Tributed, except for a Tribute Summon. When that target leaves the field, destroy all the Tokens Special Summoned by this effect.
