Shh shh shh

[Dark Initiative]

Can an eidolon with gill grab someone and hold/drown them underwater?

[Piedolon]

If they can hold them long enough.

[Lincoln Hills]

The eidolon needs the Grab ability or it will draw an attack of opportunity. And it needs the Improved Reposition or Improved Drag feat to pull things into the water without provoking another attack of opportunity. And it'll need a high enough CMB/CMD to maintain a hold. Lastly, PF characters can hold their breath for many rounds.

So... yes, but it's not likely to be very effective.

[yumad]

Lincoln Hills wrote:

The eidolon needs the Grab ability or it will draw an attack of opportunity. And it needs the Improved Reposition or Improved Drag feat to pull things into the water without provoking another attack of opportunity. And it'll need a high enough CMB/CMD to maintain a hold. Lastly, PF characters can hold their breath for many rounds.

So... yes, but it's not likely to be very effective.

Or improved grapple, you don't need grab though it would likely be the best choice.

Otherwise he is right, there is no point in doing this when you can just grapple, CMB check again to pin and tie them up / coup de grace whatever suits your fancy.