Sword of Forge and Frontier Land and card draw The Swords of series in Magic: The Gathering run a gamut of usefulness, but all of them cost three mana, grant protection from two colours, add +2/+2 and provide some kind of benefit if you can hit a player with a creature equipped with them
The combination of an Anthem and looting when our blue creatures become tapped moves Unctus up my list
Most notably, he produced Final Fantasy XIV: A Realm Reborn
By paying four generic and one white mana, you return another target creature you control to its owner's hand
It might be a specialized class, but as one of the strongest Izzet enchantments, it would fit really well in a spellslinger deck like Veyran, Voice of Duality
Lobelia, Defender of Bad End Although its a risky play, Lobelia, Defender of Bag End could give you some very powerful cards at a very low cost