Snowblind [Ice Age] Elder Demon Set: Worldwake Type: Legendary Creature

Set: Worldwake Type: Legendary Creature — Ogre Warrior Rarity: Rare Cost: {3}{R}{R} Whenever a creature an opponent controls attacks

Set: Magic 2012 Type: Creature — Merfolk Wizard Rarity: Common Cost: {1}{U} {U}

Set: Commander Anthology Type: Creature — Beast Rarity: Uncommon Cost: {5}{G}{G} Trample

Set: Fourth Edition Type: Creature — Leviathan Rarity: Uncommon Cost: {4}{U} Islandwalk (This creature can't be blocked as long as defending player controls an Island

Must these roles be mutually exclusive

Snowblind [Ice Age] Elder Demon Set: Worldwake Type: Legendary CreatureSet: Ice Age Type: Enchantment Aura Rarity: Rare Cost: {3}{G} Enchant creature Enchanted creature gets X Y. If that creature is attacking, X is the number of snow lands defending player controls. Otherwise, X is the number of snow lands its controller controls. Y is equal to X or to enchanted creature's toughness minus 1, whichever is smaller.