Hey guys wondering about some non fow ways to kill these?
Fow?
{Leyline of Sanctity}
{Erase} works well
If you're talking about how to stop them from coming into play due to being in the opening hand, nothing. Not even {Force of Will} can stop it as they can't be countered due to this ability: here's the rules errata from the oracle rulings:
8/15/2010 Your "opening hand" is the hand of cards you decide to start the game with after taking any mulligans.
8/15/2010 After all players have decided not to take any more mulligans, if the starting player has any Leylines in his or her hand, he or she may put any or all of them onto the battlefield. Then each other player in turn order may do the same.
8/15/2010 Leylines that start the game on the battlefield aren't cast as spells. They can't be countered.
8/15/2010 After each player has exercised his or her option to put Leylines onto the battlefield, the first turn of the game begins.
All leylines have the same errata.