Lightning Helix [Magic Player Rewards 2006] Elemental the only caste that cannot

the only caste that cannot be attained by either heredity or money is that of the hero

Scholars say that arbiters exist on every world

players can't cast spells or activate abilities that aren't mana abilities

Set: Conspiracy Type: Artifact Creature — Construct Rarity: Rare Cost: {4} No more than one creature can attack each combat

Rhonas the Indomitable can't attack or block unless you control another creature with power 4 or greater

Lightning Helix [Magic Player Rewards 2006] Elemental the only caste that cannotSet: Magic Player Rewards 2006 Type: Instant Rarity: Rare Cost: {R}{W} Lightning Helix deals 3 damage to any target and you gain 3 life.