Lithoform Engine

If a permanent spell is copied, it's put onto the battlefield as a token as the spell resolves rather than putting the copy of the spell onto the battlefield. The rules that apply to a permanent spell becoming a permanent apply to a copy of a spell becoming a token.

Any choices made when the spell or ability resolves won't have been made yet when it's copied. Any such choices will be made separately when the copy resolves. Most notably, if a triggered ability asks you to pay a cost (such as that of Leyline Tyrant), you pay that cost for the copy if you wish to have it paid.

If an ability is linked to a second ability, copies of that first ability are also linked to that second ability. If the second ability refers to “the exiled card,” it refers to all cards exiled by the first ability and the copy. For example, if Fiend Hunter's enters-the-battlefield ability is copied and two creatures are exiled, they both return when Fiend Hunter leaves the battlefield.