The Crystals depicted on the MTG crossover cards are specifically from Final Fantasy III , which featured a timeline where the four elemental crystals all had dark counterparts (represented solely by The Darkness Crystal)
11 Mickey Mouse, Musketeer Captain Color: Amber Cost: 7 Illustrator: Jochem van Gool Ursula's Return introduced five new Musketeer characters, including Mickey Mouse, Musketeer Captain
You must still pay all costs and follow any timing restrictions and permissions for artifact spells you cast from your graveyard this way
Notice that the second part, while limited to your first attack, is not limited per player that's to say, if you manage to hit all three of your opponents during your first attack, you get three extra attacks
This preview also confirmed that Magic: The Gathering will be following a mechanical trend that was established by the original Final Fantasy 7