Limit Over Accel Synchro Summon is a form of Synchro Summoning, in which there is a Tuner Synchro Monster and at least 2 non-Tuner Synchro Monsters used in the Synchro Summon. Currently, the only confirmed Limit Over Accel Synchro Monster that has been revealed is "Shooting Quasar Dragon."
"Shooting Quasar Dragon" was used by Yusei, when performing Over Top Clear Mind in episode 150. It has also been shown that performing Over Top Clear Mind successfully for this Summon can cause the user and their Duel Runner and the Synchro Rings to become gold-colored, implying god-like powers.