The Lay of Leithian : XII (excerpt)

Then Morgoth came. For the last time
in those great wars he dared to climb
from subterranean throne profound,
the rumour of his feet a sound
of rumbling earthquake underground.
Black-armoured, towering, iron-crowned
he issued forth; his mighty shield
a vast unblazoned sable field
with shadow like a thundercloud;
and o'er the gleaming king it bowed,
as huge aloft like mace he hurled
that hammer of the underworld,
Grond. Clanging to ground it tumbled
down like a thunder-bolt, and crumbled
the rocks beneath it; smoke up-started,
a pit yawned, and a fire darted.

Tolkien: The Lays Of Beleriand