With the new edition of Age of Sigmar comes a new boxed set. In that new boxed set, the Stormcast Eternals are getting a new unit. They're the Annihilators and you can see just what they're capable of in this preview.
From the article:
The new edition of Warhammer Age of Sigmar is launching very soon with the best Warhammer Age of Sigmar boxed set ever – Dominion. We’ve taken a look at the fantastic rank-and-file units that make up Dominion’s armies, now it’s time to focus on the heavy hitters of the Stormcast Eternals forces.
It’s obvious if you’ve met an Annihilator in combat because their hulking Sigmarite armour tends to blot out the sun. They are huge, steadfast warriors that love to hold ground and then hit back hard. Very hard. Let’s take a look at how they operate on the tabletop.