Leyline of the Future

If Leyline of the Future is in your opening
hand you may being the game with it in
play and it gains the following ability in
addition to its other abilities: Opponents
can only cast one spell on each turn that isn't
their own and one spell of each type on their
own turns.
Whenever you cast a spell choose one
of the following, that spell has that ability:
ripple 6, scry 4, surveil 3, fateseal 2, cascade.