The Stone Giant, although subdued as a stone slave, could not be taken away, nor could it even enter the Blue Sea and Cloud Sky, hence Yusuf Zuck was immensely frustrated.
Moreover, he couldn't stay because of the Stone Giant, as he needed to venture deeper; he was still seeking the rare treasures that could activate the Blood Beads.
Though the Stone Giant could help him slay enemies, what he really wanted was his own strength.
He entered the gateway of life with a heavy heart, throwing the two Stone Giants together.
He did not warn them about anything, because the Stone Giants attacked indiscriminately; anyone who approached would be attacked, no matter who it was.
However, placing both Stone Giants at the gateway entrance would undoubtedly increase the difficulty for those who came later to enter.
Guarding the gate with one Stone Giant was already extremely challenging, let alone two Stone Giants.