When you do, cast it for its madness cost or put it into your graveyard.) It feeds on shadows, fear, and blood
If the opponent taps out for a Cradle Guard on turn three, destroying a Forest can set up a two-for-one
If it's your Commander, ideally you'll want to bounce a blocker, horsemanship is cheap online, and then equip with a haste giving piece of equipment like Lightning Greaves, and then swing
There are a variety of other options you might run before this white angel, like Woe Strider or Fallen Angel, which is just this card without the setup
Whenever you copy a mutate creature while it's on the stack, like with Volo's ability, the entire chain of mutate abilities will begin again when your copy resolves, giving you so much more value than normal
It provides interaction and card advantage all in one, which is a highly desirable combination, and its included in a three-drop that has reasonable stats by itself