For his first assignment, Sam was instructed to build as many glowing walls as he could create with Bulwark’s aura while ensuring they remained in the air without dissipating. This was easier said than done because Sam needed to focus his life force on each new wall that he conjured which meant there wasn’t enough life force to maintain the wall he’d already created. With every new wall coming to life, the old ones wavered in the air for a short time and then winked out like a light bulb turning off.
“It’s like you’re asking me to look to my left while also looking to my right at the same time,” Sam reasoned.
'It’s only hard because you’re not using your gift more efficiently, lame-brain,' Chiron chided.
Sam could feel the centaur draw his attention to the wall that was just about to vanish in the air which was just to the right of the new wall he had just conjured into being.