Nahkriin, the Vengeance

Ward —pay 1 life, Nahkriin controller gain 2 life
{2}{w}, {t}: Create a 2/2 white Sovngarde Soul
creature token with "{t}: you gain 1 life".
{2}{u}, {t}: Target opponent creature gets -1/0 and "if you declare an attack with this creature: pay {1}."
{2}{r}, {t}: This card deal 2 damage to all creatures an
opponent controls.

When Nahkriin leaves the battlefield, create
Mask of Nahkriin, a legendary colorless Equipment
artifact token. If you control Nahkriin, destroy it.