El Toro's page

First - At what level do you get Ioun Buffer, is it level 6?

Second - It seems when you generate burn you can store one point of burn per Ioun stone, then if you use a blast infusion you can spend the stored burn from said Ioun stones (provided at both time they are out and circling your head); are there any limits to how often they can recieve and give out burn in a given day, can you for example generate burn, stor it in your ioun stones, then expend it on your blasts (thus emptying them) allowing you to store more burn in the same day?

So below are the specifics for the Kineticist ability know as Foe Throw
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Foe Throw

Element(s) aether; Type form infusion; Level 3; Burn 2
Associated Blasts telekinetic
Saving Throw Fort negates; see text

Your telekinetic blast can throw a Large or smaller creature instead of an unattended object; you can increase the burn cost by 1 to affect a creature of a larger size. If the creature you attempt to throw succeeds at a Fortitude save, it negates the blast entirely.

Otherwise, if your blast hits, both the thrown creature and the target take the full amount of damage from your telekinetic blast, and the thrown creature falls prone in the last unoccupied space along its path. If your blast misses, the thrown creature can choose to occupy any space within 30 feet of the target, it doesn't fall prone, and it takes half the normal amount of damage from your blast. The movement doesn't provoke attacks of opportunity.
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I have 2 questions,

(1) what happens if you use the ability on an enemy whom is grappled by someone else and held by them.

(2) what happens if Foe Throw is used on a target creature that is attached to a mount by a harness that prevents being dismounted?

Also for a bonus question

(3) can you target an empty space with For Throw?

Wizard X casts Dimension Door transporting you and a companion next to Monster Y, as you did not cast the spell can you attack Monster Y when it is your initiative - or does the actual act of Dimension Door-ing cause you to miss your turn (i.e. that counts as your turn).