Rolling 4d20 on attacks with Oathsworn?

[Orcus Porkus]

From Oath of Enmity:

If an effect lets you reroll an attack roll and you rolled twice because of this power, you reroll both dice.

From Oathsworn PP:

Sworn Action (11th level): When you spend an action point to make an attack, you make two attack rolls against each target of that attack and use either result.

That's really nice for multi-attacks like Storm of Blades.

 

[DonAdam]

I don't think Sworn Action is a reroll. Reroll ≠ roll twice.

 

[Ryujin]

I believe that Oath of Enmity states that it permits a double roll, unless you get a double roll from another source.

 

[Orcus Porkus]

Yeah sorry, I didn't get the fine distintion between rolling twice and rerolling.

Effect: When you make a melee attack against the target and the target is the only enemy adjacent to you, you make two attack rolls and use either result. This effect lasts until the end of the encounter or until the target drops to 0 hit points, at which point you regain the use of this power.
If another effect lets you roll twice and use the higher result when making an attack roll, this power has no effect on that attack. If an effect forces you to roll twice and use the lower result when making an attack roll, this power has no effect on that attack either.
If an effect lets you reroll an attack roll and you rolled twice because of this power, you reroll both dice.