Sneal, the shelled wanderer

Prophesy {g/w} (If you look at this card with a scry
ability while it's within your library you may
immediately play it for its prophesy cost.)
When this creature enters the battlefield create a
colorless artifact token with "Equipped creature
gets +0/+2 and Protection from converted mana
costs 1, 2, 3, 5, 8, and 13," and "this artifact gains
Equip {2} if the Sneal that created this artifact
leaves the battlefield." Then attach that artifact
to Sneal.