Cairn of the High King

{t}: Add one mana of any color to your mana
pool. Spend this mana only to cast legendary creatures or their activated abilities.
{1}, {t}: Target creature can't attack this turn.
"No Orc dared ever after to pass over the mount of Fingolfin or draw nigh his tomb, until the doom of Gondolin was come and treachery was born among
his kin."