It's super flexible, as you can use it when your own horde swings in, or when another player goes in on the offensive (they don't even have to be sending everything/anything at you.) However, while I can see this card working pretty well in any blue/white/green tokens deck, it's obviously best with an MTG commander that cares about birds
But if you can hit your ink every turn, you'll be in for a fun ride where it's easy to overwhelm your opponent
There are better options for reanimation, sure, but this Lich Lord is a repeatable source and with trample and flying can definitely finish games for very cheap
(2022-10-07) If a creature card in your graveyard is a double-faced card, your graveyard-creature only gains the text box on its front face
However, I realized that this sword actually works a lot better when not being used on a planeswalker
cost area, as well as setting all rested cards to active