This is a great way to protect an important permanent from removal by bouncing it before it's removed, or to reuse a powerful enter-the-battlefield trigger
Then when you swing you can flip it, but you don't have to
The Convoke ability makes it sometimes free, which increases the odds that you'll be able to play this, plus your own boardwipe, in the same turn
Legendaries come in both non-foil and foil cards, so getting any Legendary in foil will up it's rarity
The Illumneers Trove is set to be the biggest collectible set at launch, which will include eight booster packs, two deck boxes, a players guide, and a themed storage box
If any of your creatures have 7 or higher Power, at the end of combat, they untap and are able to go into combat one more time