Explore the Cloud Sea

Join forces — Starting with you, each player may
exert any number of vehicles or creatures with
flying. (An exerted permanent won't untap during
your next untap step.)
Each player searches their library for up to X land
cards, where X is the total amount of exerted
vehicles or creatures with flying, puts them onto the battlefield tapped, then shuffles.

Ahh, to sail the cloud sea, everchanging and near infinite in both beauty and danger.