AnWan
And once again, someone else's strength increases and he gets nothing. Seriously, when will Michael get an incredible opportunity. It's been so long since he got something that really increased his strength. Bow his only strength boosts seem to come from bloodlines.
He has already upgraded his sin-constitution from lvl 12 to his rainbow constitution which he said is above lvl 12. not sure if this is what you are talking about
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Michael should get a bloodline and Grand Art for his next breakthrough. If there are only five human Grand Lords, there are probably at most ten Grimm Grand Lords. That's not enough to harvest even if all Grimm Grand Lords had a bloodline. He's always complaining that the bloodline and grand arts holders are busted when it comes to development. He should take advantage of that.