Double strike
Whenever a Goblin or Orc you control deals combat damage to a player, exile the top card of your library. You may play that card this turn.
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.