I have Nature's Wrath in play and cast Mind Bend to change all instances of the word "black" to "blue". When my opponent puts a blue permanent into play, does she have to sacrifice two items, or does sacrificing one swamp, island or blue permanent satisfy both sets of sacrifice instructions? Sorry, I know I didn't word this question well.
Nature's Wrath has two separate triggered abilities. If you change "black" to "blue", then whenever a blue permanent enters the battlefield, both of those abilities will trigger. When the first resolves, they'll have to sacrifice something. Then the second will resolve and they'll have to sacrifice another.
Nature's Wrath and Mind Bend