He's OP even for T7. His energy absorption allows him to take far more than the long long range artillery bombardment mentioned as the T7 durability limit, and morever, he will explode afterwards with force exceeding the T7 power limits. There is literaly no may for the majority, if not all arena participants to kill him without making him KERBLOOOOM!!11, since it absorbs any type of energy, rite? How am i even supposed to WANT to fight that?

The mater transformation is also plenty dodgy. What stops him from turning the whole battlefield into one big explosive and then make it boom while chilling out in his energy absorbing suit? Or turn everything into plasma? Or turn his opponent into a penguin?