Talk:True damage/@comment-3486816-20110409083542

okay, two things. First of all, here it says that tenacity (the mastery) does NOT reduce true damage, but on Olaf's page it says it DOES. Which is true? Second of all, "Champions whose abilities have health costs associated with them deal true damage to themselves when they use an ability which requires health to cast." Does this mean the cost will be mitigated by leviathan/ragnarok/etc, or is the cost just considered true damage in that it's not affected by armor/mr?