Alchemy is a new play mode based on Standard featuring digital-only cards and rebalanced Standard cards
Fire Covenant is better as a three-mana instant that will let you trade life for damage as you choose among any number of target creatures
D-Tier Not Even Worth Discussing Cards: Arcum's Astrolabe, Chrome Mox, Dark Depths, Dig Through Time, Eye of Ugin, Field of the Dead, Gitaxian Probe, Hogaak, Arisen Necropolis, Mox Opal, Mystic Sanctuary, Oko, Thief of Crowns, Once Upon a Time, Seething Song, Skullclamp, Summer Bloom, Rite of Flame, Krark-Clan Ironworks, Golgari Grave-Troll, Tibalt's Trickery, Treasure Cruise, and Uro, Titan of Nature's Wrath
Angels are a great creature type, and Im hoping we see some more solid additions with New Capenna later this year