Silk Net

Oracle Text

Target creature gets +1/+1 and gains reach until end of turn. (It can block creatures with flying.)

Card Rulings

10/4/2004 Both the +1/+1 and reach only last until end of turn.
4/1/2008 This card now uses the Reach keyword ability to enable the blocking of flying creatures. This works because a creature with flying can only be blocked by creatures with flying or reach.