The new card Saryth, Viper's Fang got me excited as an addition to deathtouch strategies, but it occured to me that there is a more creative way to use her ability, if all works as I think it does. In the instance of a creature with a Tap ability, such as the aforementioned Goblin Sharpshooter, the ability is placed on the stack waiting to resolve, and Saryth now sees a tapped creature and grants deathtouch. The damage ability now resolves and deals the damage to target creature from a source with deathtouch. With Sharpshooter, this allows him to essentially machine gun his way through just about any creature on the field. Does this work as I think it does or am I way off base?
Indeed, if you control Saryth and Goblin Sharpshooter, and if Goblin Sharpshooter is tapped while it deals damage to a creature, the damage to that creature will be from a source with deathtouch and the creature will be destroyed as a state-based action (C.R. 704.5h, 109.5). Once that creature is destroyed this way, Goblin Sharpshooter's second ability will trigger (C.R. 603.2, 700.4, 701.7a).
See also this thread.