The armies of Jon Snow (Kit Harington) and Daenerys Targaryen (Emilia Clarke) began excavating dragonglass from beneath Dragonstone midway through Season 7-s o that half of the combat plan is covered-but the ultra-rare Valyrian steel has been spread across Westeros.
Only two weapons are effective against the Night King, his White Walkers and the army of the dead: dragonglass and Valyrian steel.
