Thunderblight Ganon is an incredibly fast and aggressive boss that uses lightning attacks and a sword. Phase 1: It will teleport rapidly and attack with quick sword strikes. Its weak-point gauge often appears after it finishes a combo or when it charges up a lightning attack. Use Stasis (L + A) to freeze it when it's vulnerable.
Phase 2: It will summon metallic pillars and electrify them. Use Magnesis (L + B) to grab one of the pillars and direct it towards Thunderblight Ganon. Hitting it with its own electrified pillar will stun it and expose its weak-point gauge for a significant duration. Urbosa is an excellent choice for this fight due to her lightning immunity and powerful attacks. Be prepared for a fast-paced battle. Rewards include Blight Ganon parts and rare weapons.