Why can't I grind my three Purple Shields?
I have 3 Purple Shields, and I tried to grind them. None of them are Mission Rewards.
Is it because one of them was from grinding three Legendary Shields, and so it technically isn't of the same rarity?
Best Answer
Yes, that seems to be the case. Swapping out the Legendary-derived Purple for one derived from Blues made it work.
And that Legendary Purple can be ground with actual Orange Legendaries.
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How do you grind shields in Borderlands pre sequel?
Grinding Legendary, Purple, Unique and Rare WeaponsIf you add two legendary and one purple items. The purple item added to the grinder will dictate the legendary base type. Lowest item added in the grinder in this combination will dictate the level of the crafted item.Liz Phair - Why Can't I? (Official Video)
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