Dharok, The Wretched2

As long as your life total is less than or equal to half your starting life total, Dharok, The Wretched gains first strike.{Lns} Wretched Strength At the end of your upkeep, you may deal {x} damage to yourself. Choose one or both of the following: -Dharok gains +{x}/+0 until end of turn -Sacrifice {x} creatures, Dharok gains indestructible until end of turn.{/fontsize20} {flavor}A vengeful spirit corrupted by dark magic.{/fontsize14}