Vexer is your first major boss encounter in Martel Temple. This boss is a large, armored knight. His attacks are primarily physical and can hit hard if you're not careful. He has no particular elemental weakness, so focus on raw damage. Keep Lloyd on the offensive, using Sword Rain for multiple hits. Genis should cast his strongest elemental spells (Fire Ball or Ice Lance) to deal consistent damage. Raine's priority is healing with First Aid; keep an eye on everyone's HP. Use Apple Gels as needed. Guard frequently with Lloyd to mitigate damage. The key is to maintain consistent damage output while keeping your party's HP high. Don't let him focus on Raine or Genis.
