Vaun's Nail

When Vaun's Nail is removed from the battlefield, return it to its owner's hand instead.
Equipped creature gets +2/+2 and deathtouch.
At the beginning of the next end step, unattach Vaun's Nail.
{b}{b}: Attach Vaun's Nail to target creature you control. Activate this ability only when Vaun's Nail is not attached to any creatures.