Leyline of Scouting

[diopter]

I like the Leyline cycle (even if I don't enjoy playing against Leyline of the Void too much). They add a very interesting aspect to the game.

I was thinking of a way to balance the potential turn-0 power of a Leyline - and this is what came up with:

Leyline of Scouting
2WU
Enchantment
If Leyline of Scouting is in your opening hand, you may begin the game with it in play.
If you begin the game with Leyline of Scouting in play, or as Leyline of Scouting comes into play, each player names a card. The named cards can't be played.

Can the card work under the rules? Is the effect interesting, broken, unplayable, etc.? Is it worth it to nab your opponent's Force of Wills if he can take your Tendrils of Agony? Discuss.