Right now, these three cards alone are nowhere near enough to make you commit to a fully colorless deck
Beyond messing with the opponents mana, the fact that Spreading Seas specifically makes the Land an Island means that cards like Lord of Atlantis and Master of the Pearl Trident that grant Islandwalk to your other Merfolk become more reliable
If one of those amounts of combat damage is enough to cause the player being dealt damage to lose the game, Angel of Destiny's first triggered ability has you gain life, but the other player has already lost the game and can't gain life
Play it in themed Commander decks like Doran, the Siege Tower or Arcades, the Strategist to transform your defense into a real offensive threat
A The Fourteenth Doctor proxy lets you run this powerful staple across every deck you own without paying secondary market prices
Phase Main Phase End Phase The object of the game in One Piece is to successfully attack your opponents Leader when they have no Life cards left to draw