While its one of the most difficult to play, its also the most rewarding
This equipment gives ward to defend your creature and makes the equipped creature unblockable
To show how efficient this card is for the right deck, the final versions of Miracle Grow, which were dubbed Super Grow, used Mystic Enforcer as a finisher, since by the time you'd get around to casting it you had an all but guaranteed 6/6 flyer for four mana
Since it has to attack to get its payoff, it's relegated mainly to aggressive decks, putting it in a rough position
Vivi Ornitier's effect is so good, and can be copied onto other creatures (something Izzet Cauldron decks do in Standard), so they too can provide mana to make for explosive turns where you can play your entire hand and draw a bunch of cards
This is a Sorcery card featured in the Innistrad expansion that allows the player to return two random cards from their graveyard back into their hand