Swan Knight

Rally - As long as a legendary creature under
your control is attacking or blocking,
Swan Knight gains +1/+1.
When Swan Knight enters the battlefield, search
your library for one legendary creature, reveal it,
then put it into your hand.
"The Princedom of Dol Amroth is ever ready to help
their Lords of Minas Tirith in times of war."
-The Chronicle of Gondorian Realms