He pants for a moment and then clutches his fists and does his best to free most of his remaining tentacles from the pseudopod. He begins battering the beast with everything in his natural arsenal, focusing all of his power into ripping and tearing it apart. He continues to roar in an unnatural tone.

Spoiler
Show
Full attack with all natural weapons available to me, full power attack and shock-trooper-ing it.

Tentacle Whip: (1d20+19)[25]
Claw: (1d20+16)[27]
Tentacle 1: (1d20+16)[18]
Tentacle 2: (1d20+16)[24]
Tentacle 3: (1d20+16)[25]
Tentacle 4: (1d20+16)[34]
Tentacle 5: (1d20+16)[25]
Tentacle 6: (1d20+16)[33]
Tentacle 7: (1d20+16)[18]

Tentacle Whip: (1d4+17)[19]
Claw: (1d4+17)[19]
Tentacle 1: (1d4+14)[17]
Tentacle 2: (1d4+14)[17]
Tentacle 3: (1d4+14)[18]
Tentacle 4: (1d4+14)[16]
Tentacle 5: (1d4+14)[16]
Tentacle 6: (1d4+14)[15]
Tentacle 7: (1d4+14)[15]