Polly, the Sun Dog

Indestructible, trample, flying, lifelink, vigilance
When Polly, the Sun Dog deals combat damage
to a player or planeswalker, search your library
for an aura or equipment with mana value X,
where X is the number of permanents attached
to Polly, the Sun Dog, then put it onto the battlefield attached to Polly, the Sun Dog, then shuffle.