Impigo implales the cloaked dwarf with his invisible tusks, that become uninvisible, or visible, as some say.
Spoiler: AoO
(1d20+16)[35] (1d8+12)[15]
Then he pushes on with another round or relentless Tusking
Spoiler: full round attack
(1d20+16)[17] (1d8+12)[14]
(1d20+11)[17] (1d8+12)[15]