Equipped creature can't attack, block, or
transformTo transform a permanent, turn it over so that its other face is up. Only permanents represented by double-faced tokens and double-faced cards can transform. (See rule 712, “Double-Faced Cards.”)
Although transforming a permanent uses the same physical action as turning a permanent face up or face down, they are different game actions. Abilities that trigger when a permanent is turned face down won’t trigger when that permanent transforms, and so on.
If a spell or ability instructs a player to transform a permanent that isn’t represented by a double-faced token or a double-faced card, nothing happens.
If a spell or ability instructs a player to transform a permanent, and the face that permanent would transform into is an instant or sorcery face nothing happens.
Some triggered abilities trigger when an object “transforms into” an object with a specified characteristic. Such an ability triggers if the object either transforms or converts (see rule 701.28) and has the specified characteristic immediately after it does so.
If an activated or triggered ability of a permanent that isn’t a delayed triggered ability of that permanent tries to transform it, the permanent does so only if it hasn’t transformed or converted since the ability was put onto the stack. If a delayed triggered ability of a permanent tries to transform that permanent, the permanent does so only if it hasn’t transformed or converted since that delayed triggered ability was created. In both cases, if the permanent has already transformed or converted, an instruction to do either is ignored.
Some spells and abilities refer to a “transformed permanent.” This phrase refers to a double-faced permanent on the battlefield with its back face up. A permanent with its front face up is never considered a transformed permanent, even if it had its back face up previously. Similarly, an object represented by more than one card, such as a melded or merged permanent, is never considered a transformed permanent, even if it has components that are back face up. See rules 701.42, “Meld,” and 730, “Merging with Permanents.” (CR 701.27), and its activated abilities can't be activated.
Shackle
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AttachTo attach an Aura, Equipment, or Fortification to an object or player means to take it from where it currently is and put it onto that object or player. If something is attached to a permanent on the battlefield, it’s customary to place it so that it’s physically touching the permanent. An Aura, Equipment, or Fortification can’t be attached to an object or player it couldn’t enchant, equip, or fortify, respectively.
If an effect tries to attach an Aura, Equipment, or Fortification to an object or player it can’t be attached to, the Aura, Equipment, or Fortification doesn’t move. If an effect tries to attach an Aura, Equipment, or Fortification to the object or player it’s already attached to, the effect does nothing. If an effect tries to attach an object that isn’t an Aura, Equipment, or Fortification to another object or player, the effect does nothing and the first object doesn’t move.
Attaching an Aura, Equipment, or Fortification on the battlefield to a different object or player causes the Aura, Equipment, or Fortification to receive a new timestamp.
To “unattach” an Equipment from a creature means to move it away from that creature so the Equipment is on the battlefield but is not equipping anything. It should no longer be physically touching any creature. If an Aura, Equipment, or Fortification that was attached to an object or player ceases to be attached to it, that counts as “becoming unattached [from that object or player]”; this includes if that Aura, Equipment, or Fortification leaves the battlefield, the object leaves the zone it was in, or that player leaves the game. (CR 701.3) to target creature you don't control. Shackle only as a sorcery.)