Ren's consciousness was getting a little hazy, his right arm was numb, and his breathing was becoming unstable. Still, the smile on his face never faded, he even became more excited as his regeneration was no longer able to help him keep his wounds in check.
Even though Ren could already use summoning spells, and could summon an army to fight for him, he did not do so. The reason for that is because this was a test the original incarnation gave him, well that's what he tells himself, but the truth is he didn't want anyone helping him in this enjoyable battle of his. Ren wanted to enjoy this battle with his body, and as he expected it was a thrill like no other. Ren looked ahead and saw that the hundreds of Demi-Gods he was facing were now left with only three people.