Your touch attack causes your target to become painfully malformed. Its limbs twist and buckle, while its body contorts uncontrollably, shifting and warping. Each round the target suffers excruciating pain and takes 2d6 points of nonlethal damage, 1 point of Dexterity damage, and 1 point of Constitution damage, and its speed is reduced by 10 feet. Once per round as a free action on its turn, the target can attempt a new Fortitude saving throw to resist the spell for 1 round.
If the caster scores a critical hit with this spell is the damage doubled for only the initial hit or for every round thereafter as well?
Only the first round.
I suposse that in similar spells, like acid arrow, is made in the same way, only first damage is doubled, right?
That brings me another question, When you maximizes an spell that deal damage over time (Excruciating Deformation, Acid Arrow, Fire Storm...) only is maximized the initial damage? or are maximized the entire spell?