There is a turn 3 kill involved with this guy.
T1 Goblin Guide take 2
T2 Bushwhacker Kicked take 5
T3 Goblin Grenade, Goblin Grenade, Lightning Bolt take 13 game.

This is the best goblin two drop ever printed for aggressive styles. (aside from having 3 goblin guides and 2 mountains in your opening hand).

Also has the option to just come into play for 1 mana so you can blow it up with goblin grenade immediately.

I would definitely play over mogg war marshall if you plan on using goblins as a source of damage.