Roil Zang, Shifty Duelist

When Roil Zang, Shifty Duelist enters the battlefield initiate a Duel with another creature (Two creatures fight, but it creates a duel step where instants and sorceries may be cast before damage is dealt)
When Roil Zang, Shifty Duelist is Dueling it deals combat its Duel Damage First
{1}{b} Gains Deathtouch until end of turn