Flamespeaker's Will
Journey into Nyx — common
Enchantment — Aura
Flamespeaker's Will rulings:
2014-04-26: You decide whether to sacrifice Flamespeaker's Will as its triggered ability resolves. If it's not on the battlefield at that time, you can't sacrifice it and destroy the target artifact.
2014-04-26: If another player gains control of the enchanted creature, Flamespeaker's Will will be put into its owner's graveyard.