(2007-05-01) Note that the exact wording of this card has changed since it was printed in the _Future Sight_(TM) set, but its functionality is the same
Blue decks often fill their graveyards naturally, so exiling seven cards is an achievable milestone
Escape was a tricky mechanic for WotC to get right
Because damage remains marked on creatures until the damage is removed as the turn ends, nonlethal damage dealt to creatures you control may become lethal if Leyline of Hope leaves the battlefield or if your life total drops below 7 life more than your starting life total
The only certainty produced from these conversations came when I asked, "How bad would it be if they entered on your side, then moved to the protector's side during combat?" Finally, everyone agreed on something: it would be very confusing and distracting, would potentially shift around planeswalkers you were planning to attack, and I shouldn't have suggested such a thing
Higher-risk than older sealed (still in print as of writing), but lower entry cost