Let's look at them
Sword of Truth and Justice - The sword cycle mainly falls in two camps: Sword of Fire and Ice and Sword of Body and Mind, whose triggers are guaranteed to get value, the same thing, time after time and Sword of Light and Shadow, Sword of Feast and Famine, and Sword of War and Peace, whose usefulness varies from useless to absurd
Pay a snow mana, and it also gives a creature defender until end of turn
You get the efficient power and control of Counterspell alongside a huge burst of mana with Mana Drain, the best blue instant outside of the Power Nine
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Notes and Rules Information for Fang, Fearless l'Cie: If multiple cards leave your graveyard at the same time, Fang's ability will trigger only once
Thematically, a fantastic but terrifying fit