The first time I saw Diablo 3 was at its initial unveiling in 2008. It had a dizzying system of rune items that could be picked up and socketed — not into equipment, as in Diablo 2, but into your character's skills themselves, to modify their effects. Any rune could be used to modify any skill, and there were seemingly dozens if not hundreds of the things, opening up endless possibilities for skill customization.

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