It ramps you while essentially gaining you a bunch of life by being a great blocker
It's cheap, and quite good, but the power isn't there as much, so it's just hitting at 5, but it's quite good in decks like Spellslinger in Jeskai (built around Whirlwind of Thought), storm, aggro that casts a few spells on your turn like Glorious Anthem and Isamaru, Hound of Konda, control decks with a bunch of instants, flash-matters, and then other key places as well
Mithril Coat - Hammer of Nazahn at instant speed
The second ability is also deeply underwhelming, even in dedicated Energy lists
It has more impact on an EDH game than any other card Ive personally seen
Decking In a constructed format where the minimum deck size is 40 cards, decking your opponent is a more attractive option than is usually the case, when they have a larger deck