Disclaimer: I DO NOT play Blue. Ever. Blue generally irritates and annoys me. I am very Red in personality, and my comfort zone(which I am quite happy to remain in) is with Red, Black, and White(and not a lot of Black, really). Therefore, this is theoretical. I have never tested this. Sea's Claim Looks pretty at home in a deck brimming with islandwalk creatures(maybe Merfolk tribal?). Slap a playset into your islandwalk-filled deck, and now you're really an irritation to that opponent who's playing red/white and figured your islandwalk was just a crappy party trick with no real ramifications in the current game(that's me, by the way).