The only times I use it are when I need to up his loyalty or on a Commander to sort of turn them off for a full round
Zur decks are very powerful, and can win the game on their own, just by attacking and then putting enchantments onto the battlefield from your library for free
You can directly tutor Field of the Dead out from your deck with Crop Rotation by trading any one land for it by sacrificing it, or Urza's Cave, which can sacrifice itself for three mana to put any land from your library onto the battlefield
This has a lot of obscene applications
In each Special Edition Collector Booster, you'll find a surge foil map basic land and a surge foil extended-art rare or mythic rare
This means that you can only ever control one of these equipment with the same name, and whenever you control two with the same name, you must choose one to keep and one to sacrifice