2010-08-15 : After the second ability resolves, the revealed card stops being revealed in its owner’s hand.

2010-08-15 : Islandwalk cares about lands with the land type Island, not necessarily lands named Island.

2010-08-15 : The next time Merfolk Spy deals combat damage to the same player, the card that’s revealed at random may be the same card or may be a different card.

2010-08-15 : The second ability triggers just once each time Merfolk Spy deals combat damage to a player, regardless of how much damage it deals.