Destroy target artifact, target creature, target enchantment, and target land. (You can’t cast this spell unless you have legal choices for all its targets.)
You must choose a legal target for each target required by Decimate. However, if a permanent has multiple card types, it may be chosen as the target for more than one instance of the word "target." For example, you could cast Decimate targeting an artifact creature, an enchantment, and a land.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.