2004-10-04 : Aluren checks the actual printed cost on the creature card, and is not affected by things which allow you to cast the spell for less.

2004-10-04 : The mana cost of the creatures being cast is still the stated cost on the card, even though you did not pay the cost.

2004-10-04 : You can’t choose to cast a creature as though it had flash via Aluren and still pay the mana cost. You either cast the creature normally, or via Aluren without paying the mana cost.

2004-10-04 : You can’t use Aluren when casting a creature using another alternate means, such as the Morph ability.

2008-08-01 : If creature with X in its cost is cast this way, X can only be 0.