The Space stone

Shroud
{4}: You gain control of this artifact. Any player
may activate this ability.
{x}, {t}: Exile up to X nonland permanents you
control until end of turn.
{x}{x}, {t}: Up to X creatures gain unblockable
until end of turn. Only activate if you control 3
or more Infinity Stones.
{x}{x}, {t}: Exile X target permanents. Only
activate if you control 5 or more Infinity Stones.