Moon-Weft Illusion

Flash
When Moon-Weft Illusion enters the battlefield,
exile target legendary creature you control until
Moon-Weft Illusion leaves the battlefield. Then
Moon-Weft Illusion becomes a copy of the
exiled creature.
"Send word far and wide: Of the last Queen of Caria, Rennala of the Full Moon, and the majesty of the
night she conjureth."