When Molten Primordial enters the battlefield, for each opponent, gain control of up to one target creature that player controls until end of turn. Untap those creatures. They gain haste until end of turn.
1/24/2013 You can choose a number of targets up to the number of opponents you have, one target per opponent.
1/24/2013 Molten Primordial’s triggered ability can target a creature that’s already untapped.