A Demon's Touch

Join forces — Starting with you, each player may
pay any amount of mana. Each player loses X
life, where X is the total amount of mana paid
this way. For each player that paid mana, that
player searches their library for a card, reveals
that card, and puts it into their hand, then
shuffles.
A demon's touch is dangerous by all means; but if you
are in control, then that danger is yours to wield.