Mount Doom

{T}, Pay 1 life: Add {B} or {R}.
{1}{B}{R}, {T}: Mount Doom deals 1 damage to each opponent.
{5}{B}{R}, {T}, Sacrifice Mount Doom and a legendary artifact: Choose up to two creatures, then destroy the rest. Activate only as a sorcery.

The Lord of the Rings: Tales of Middle-earth

For the last ability, none of the chosen creatures are targets of the ability. You may choose creatures with shroud, for example.

You must follow all normal timing rules for a card you play using Moria Marauder's last ability and, if it's a spell, you must pay its costs to cast it.