Solid Burning is Geed's Fusion Rise strength form which uses the powers of Ultraseven and Ultraman Leo. This form debuts in Ultraman Geed episode 3.
In this form, Geed's body is covered in vents through which he can either release steam or shoot fire/energy to boost his attacks. He fights using various martial arts techniques along with the use of his Geed Slugger.
Via his rocket booster/heat vent-like attachments, Geed can perform various feats.