How a player get Rend?

[Karse]

Rending Fury (Combat)

You easily tear your enemies limb from limb with your natural attacks.

Prerequisite: Base attack bonus +6, rend special attack.

Benefit: You deal rend damage if you hit with half the normal natural attacks your rend requires.

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This feat requires rend special ability to be able to get or qualify for it, but I have no idea how to get rend.

[Karse]

Bump

[KainPen]

two weapon rend. =)but this feat has to do with natural weapon so my guess it is ment to be used with monsters or animal, summons ect.

[Rynjin]

Be a Synthesist Summoner or just an Eidolon.

Watch out for players who think you can get multiple rends per round.

[fretgod99]

If you have two claw attacks (Catfolk or Tiefling with alternate racial features, for instance), you can get Rending Claws.

[Kahn Zordlon]

Beast Shape IV

It's a spell that lasts 1 minute/level and is 6th level. The beastmorph archtype (alchemist) goes up to beast shape III, and lasts 10 minutes/ 1 hr per level (depending on alchemist level).

[Kolokotroni]

like fretgod said its basically a follow up to rending claws for a natural weapon pc.