Talk:Chalice of Harmony/@comment-4849897-20120305194139/@comment-62.163.167.91-20120307195820

The notes are a lot more clear about this. They clearly state it increases mana regen from all sources including items, runes, masteries, buffs and champion abilities.

Anyway I think with base regen in this context they mean the regen you have before chalice's effect is applied, not the actual base regen of a champ.