If you cast a spell with its escape permission, you can't choose to apply any other alternative costs or to cast it without paying its mana cost. If it has any additional costs, you must pay those.
Fruit of Tizerus
After an escaped spell resolves, it returns to its owner's graveyard if it's not a permanent spell. If it is a permanent spell, it enters the battlefield and will return to its owner's graveyard if it dies later. Perhaps it will escape again—good underworld security is so hard to come by these days.
Escape's permission doesn't change when you may cast the spell from your graveyard.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Bastien L. Deharme
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