Call of the Forge God

A war-horn sounds as you reach out your hand and call out to the forge god Reorx, calling forth his mighty warhammer ‘Reorx’s Strength’. The god-sized hammer appears at the end of the spells effect range and flies towards you in a 10' wide line with the first action. All creatures in the area of effect must make a DEXTERITY saving throw. On a failure the creature takes 4d6 force damage, is marked, and has it’s movement halved until the end of its next turn; on a success creatures take ½ damage and are not slowed or marked. On the second action you slam the hammer into the ground and create a rolling shockwave in the earth that travels away from you in a 10' wide, 60' long line (this area can be different than the area affected by the incoming hammer). All creatures in this area must make a DEXTERITY saving throw; on a failure creatures take 4d6 force damage and are knocked prone, on a save creatures take ½ damage and are not knocked prone. If a creature that is marked by the incoming hammer gets hit by the shockwave, that creature takes an additional 4d6 fire damage, as the mark explodes.