Enchant creature or land Enchanted permanent has "At the beginning of your end step, sacrifice this permanent and attach Nettlevine Blight to a creature or land you control."
2007-10-01
Nettlevine Blight grants the triggered ability to the enchanted permanent, so "you" refers to that permanent's controller. The ability will trigger at the end of that player's turn, and that player chooses the new creature or land to attach Nettlevine Blight to. The player must choose a creature or land they control.