Bgs bug with MD
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So I was using my shiny new r3 sigil witch against gorr this meta for some testing and I realized I wasn't gaining any power when I nulify even though I have 5/5 MD. I would however gain power when his buffs would expire, just not nullify. I have a full video but nowhere to post it but here are some screenshots. 
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If you follow the time it will show you the proper order
Here it is👍