Collective Voyage is a rare Sorcery card from Commander 2011 (CMD), collector number 147. Current market price: $6.48, TCGplayer market prices via Scryfall.
Join forces — Starting with you, each player may pay any amount of mana. Each player searches their library for up to X basic land cards, where X is the total amount of mana paid this way, puts them onto the battlefield tapped, then shuffles.