He decided to let the two books to fused because he had obtain a knowledge from their energy.
The hole in the sky wouldn't disappear as long as the two books do not fused and behind the hole were undeads that have varying strength.
There is a high chance that undeads of Transcendent Realm would appear since the passage only support Transcendent those that have higher ranks wouldn't be able to pass through.
But it would already be disastrous if more than one Transcendent undead manage to pass through the hole.
Back in the present the two books finally started fusing together as the hole started flickering as if it would disappear in a second.
Boom! Finally with an explosion the two book fused together and the hole in the sky disappears as the undeads stop multiplying.
Shadowslash then approached the totem in front of him yes the two books have fused becoming a totem.
