Underground Assassin

Syndicate 3—{3}{b} (You may pay an additional {3}{b} as you cast this spell. If you do, search your
library and/or graveyard for a creature card with
mana value 3 or less that shares a creature type with
this, and put it onto the battlefield tapped. If you
search your library this way, shuffle it.)
Menace, deathtouch
Whenever Underground Assassin attacks, create
a Treasure token.