Arthas, Lich King

When Arthas, Lich King enters the battlefield, sacrifice creature,
deal damage to target opponent equal to half of
that creature's mana cost (minimum of one)
{t}{x}{5}: tap {x} creatures where {x} is equal to the number of extra mana spent
{4}: Destroy target tapped creature
You speak of justice? Of cowardice? I will show you the justice of the grave and the true meaning of fear.
-The Lich King during the Battle of Angrathar.