Lightfoot Rogue (111) [Adventures in the Forgotten Realms]

Sneak Attack — Whenever this creature attacks, roll a d20. 1—9 | This creature gains deathtouch until end of turn. 10—19 | It gets +1/+0 and gains deathtouch until end of turn. 20 | It gets +3/+0 and gains first strike and deathtouch until end of turn.