Duric, The Ironheart

Menace, Haste
{r}: Duric, The Ironheat gains double strike
until end of turn
{1}{b}{r}: Until end of turn, Whenever Duric,
The Ironheart blocks or becomes blocked by a
creature, tap that creature at the end of combat.
That creature doesn't not untap during it's
controller's next untap step