Legionary Assassin

Sneak Attack - Whenever Legionary Assassin
attacks, roll a d20.
1-9 | Legionary Assassin 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.
"The Caesar has marked you for death... and
the Legion obeys. Ready yourself for battle."