Jaena's Will

When Jaena's Will enters play, you may return
a creature card from your graveyard to play and
attach Jaena's Will to it. If you do, Jaena's Will
becomes an Aura with 'Enchant creature',
and 'When Jaena's Will leaves play, sacrifice
enchanted creature'.
At the beginning of your end step, if Jaena's
Will is not attached to a creature, sacrifice it and
you lose 2 life and draw two cards.