Revered Unicorn | Magic: The Gathering
Formats Revered Unicorn is Legal in
Official Oracle Text for Revered Unicorn
When Revered Unicorn leaves the battlefield, you gain life equal to the number of age counters on it.
—Hanna, Weatherlight navigator
Official Rulings for Revered Unicorn
4/1/2008 : If you choose not to pay Revered Unicorn's cumulative upkeep, it will still get an age counter before being sacrificed, which impacts the amount of life you gain.