8/8 FREE, PROTECTED
David's answer to your first question is correct.
A second one is this: Are there any limits to the number of Pillar cards that can be used for making contributions to the obelisk? I know it says you may make one or more, so theoretically you could save a bunch and do a complete sweep of the obelisk in one move, right? (I know, it would be hard to pull off, but it's a possibility).
You may use as many Pillar cards as you want/can afford in one turn.