With their physique they even had a hard time moving around so Reias forbidden them from ever using it if their life isn't on the line.
But this show just how frightening fusion is from the whole Dukedom only old man Fresackio and his granddaughter Rosa are the only people that managed to accomplish this achievement.
The only reason for Terriz to accomplish this task is because of his naive personality and his bond with Chinbu.
Most Tamers thought of their monsters as slaves and even if some take cares of their monster like a family they still need a catalyst to achieve fusion.
For Terriz it's because of his bloodline and an event where both he and Chinbu buried themselves deep into the ground slumbering for three weeks.
Next and the final person on the list is the captain of their group Big Bear.
Since he is the oldest and most mature he was made as the leader and because of this the pressure on him was quite heavy.
