Remur, Remade Missile

Remur is not a creature unless you control 5 or more Artifacts. Haste, indestructible,
{t}, Every player puts the top 20 cards of his or her library into his or her graveyard
{t}{x}, Every player puts the top {x} cards of his or her library into his or her graveyard
{t}{x}{b}, Every player puts the top {x} cards of his or her library into his or her graveyard and loses {x} life ,If you have zero cards in your library, you gain 2 life and win the game