Vessel, Sealer of Tombs

When Vessel, Sealer of Tombs enters the battlefield, each tapped creature does damage equal
to its toughnessto its controller. Untap them.
At the beginning of combat on your turn, tap two
target creatures. When Vessel, Sealer of Tombs
leaves the battlefield, enchant each tapped creature
with a sealed token. (A sealed token is an
enchantment with "Enchanted creature doesn't
untap on its controllers untap step. When creature untaps, sacrifice this enchantment")