[Ranylyn]

You still take damage on the turn that the poison wears off on but you do not regen the 5 FP as normal. You're essentially taking extra damage for no benefit, and the Wyverntouched's entire racial gimmick is the poison, after all.

Example scenario:

Round 1: Self Bite. Gain the Strength boost from the venom. No FP regen or poison damage yet.
Round 2: Poison damage. FP regen. Strength still boosted.
Round 3: Poison Damage. FP regen. Strength still boosted.
Round 4: Poison damage. No FP regen. Strength boost is gone.

I'd suggest that the poison benefits should take effect on the turns you take poison damage on (So no strength boost on round 1, since the venom hasn't circulated yet, and both the Strength boost and FP regen on round 4) to make it more consistent.