I created an account to post here because it seems you get good responses on this website. My friends and I were having a good game of magic when it started to get a bit heated. My friend played the card Linvala, Keeper of Silence. The other friend then attached a Lightning Grieves artifact to one of his creatures that had an ability that could be activated with tapping into his mana pool. Would Linvalas ability to negate all other creatures ability be negated by Lightning Greaves? Thank you for the responses.