Mackenzie's Outburst

Choose one at random:
•Target player chosen at random gains 7 life.
•Change the target of target single target spell,
target chosen at random.
•Target player chosen at random exiles the top
card of their library. For as long as that card
remains exiled, you may look at it, play or cast it,
and spend mana as though it were any type to
cast it.