The blast sent at his back is dodged, but the point-blank punch--Trunks throws up an arm to block, before lashing out with one of his own. "All I have ever done is fight for the FUTURE!" Anger in his yell, fueling his determination further. Lashing out at the illusion with a hard punch-kick combo. Hadn't this being learned that anger was fuel to a saiyan?

The Gohan the entity had pulled form his memory, whether the alternate younger one in the past that Trunks had met, or his own version from his own timeline... Neither had passed Super Saiyan 1 to Trunk's knowledge. With Trunks unleashing his fury and his new level, hopefully it would be enough.