When Maim Blackhand heard that the New Horde of Azeroth had been forged into strength by Rend, he decisively accepted Garrosh Hellscream. Since Garrosh was the heir his younger brother had chosen, he was practically Maim's own younger brother. He would not transfer his hatred for Grommash Hellscream onto Garrosh Hellscream.
Facing Maim Blackhand's expectant expression, Garrosh did not tell him that Rend was trapped deep within the Black Empire's territory. He could not imagine how devastating the news would be to Maim Blackhand.
Rather than let the Blackrock Clan hide once more in the deep mountains of Gorgrond, it would be better to find a way to move them to Azeroth and merge them with the Blackrock Clan of Noxus, Azeroth.
"Garrosh, you are even stronger than I am. With your help, we can definitely retake Blackrock Foundry and drive out those plant creatures." Fire blazed in Maim Blackhand's eyes. News of his brother Rend Blackhand had stirred his spirits, and with the Kor'kron Legion squad's help in defeating the Sporemounds plant creatures outside Blackrock Foundry, he wanted to reclaim the foundry in one stroke.
Garrosh Hellscream looked at the Kor'kron Legion squad behind him and the thousand Blackrock Clan warriors, feeling rather helpless. Compared to Rend, Maim Blackhand's mind really was...
However, Garrosh Hellscream also wanted to enter Blackrock Foundry first, observe what the Sporemounds were doing, and only then make a plan.
Before long, the two sides joined forces. With Garrosh and the Kor'kron Legion squad's help, the Blackrock Clan returned to Blackrock Foundry after more than twenty years. Yet the foundry no longer resembled what it had once been, completely covered by the Sporemounds' vegetation.
Though Blackrock Foundry had been utterly transformed beneath the Sporemounds' overgrowth, Maim Blackhand quickly found the route. After killing every Sporemounds