If this monster is blocked but is not knocked out, it deals damage equal to its attack to your opponent (in addition to the damage it has already dealt to its blockers).
If I use Thrown Car or Horn of the Unicorn on a lvl 3 Obelisk to give it Overcrush, and the opponent blocks with something with a lower def (let's say a sidekick), will the Overcrush damage (8 damage) be added to Obelisk's effect (9 damage) doing 17 damage total to the other player?