Sebastian was extremely excited by his discovery but he didn't just decide to rush in immediately, he was patient and decided to make targeted plans before he made his way inside this inheritance ground.
The fact that the inheritance ground was in an extremely remote corner of the Blood Wreckage did not fool him, Sebastian was pretty sure that other predators probably already met this inheritance ground.
This meant that there was a great likelihood of powerful rivals already being inside the inheritance ground. To go against them, he needed to be prepared.
And besides, from what Tornado, his master at some point taught him, inheritance grounds were not exactly rosy grounds to gain benefits always.
Inheritance grounds were of 2 different types, they could either be those left by evil and vengeful predators or those left by a cheerful and good predator.