Arcane Bloodline (Bloodrager)

At 1st level, the DC to cast spells defensively increases by 2 for enemies within your threatened area. This increase stacks with that granted by the Disruptive feat.

At 4th level, when entering a bloodrage you can choose one of the following spells and apply its effects to yourself: blur, protection from arrows, resist energy (choose one energy type), or spider climb. These effects last for as long as you continue bloodraging, regardless of the spell’s normal duration.

At 8th level, when entering a bloodrage, you can choose to apply the effects of either displacement or haste to yourself. This is in addition to arcane bloodrage, and otherwise works as that ability.

At 12th level, you gain a number of extra attacks of opportunity equal to your Dexterity modifier (minimum 1). You can use these attacks of opportunity only against spellcasters in your threatened area who cast or attempt to cast defensively. The Spellbreaker feat, the caster’s bane bloodrage power (see below), or some similar effect is still required to make attacks of opportunity against spellcasters who are casting defensively. You have this ability constantly, even while not bloodraging.

At 16th level, when entering a bloodrage you can choose one of the following spells and apply its effects to yourself: beast shape IV (choose a creature your size or larger only), form of the dragon I, or transformation. This is in addition to arcane bloodrage and greater arcane bloodrage, and otherwise works as those abilities.

At 20th level, spellcasters with a caster level lower than your bloodrager level always provoke attacks of opportunity within your threatened area, even when casting defensively. You have this ability constantly, even while not bloodraging.