Herald of the Buried

Sunken Sky: 2 Turns after this card is
summoned, if the card is still on the field,
it Deals Half the player's health of damage
to all things on the Enemy's side including
the Enemy Player, if the player is on 1 health
the skill does no damage. (Limit of 1 use)
For 2 Turns after it is summoned it is
unable to attack