Well, if I by any chance would be using same pillars as my mark, the enemoy would obviously notice the lack of stacking.
Still, having him have to wait one turn out is powerful as it is.
10 HP is a bit low as well, with all the healing possiblities, especially for such a powerful effect as stopping a whole card no matter what. I could be playing a Phase Dragon and you'd counter this by just losing a measly amount of quanta or HP.
The point is that it looks
exactly like a Pillar/Tower. This means that it will go on top of the stack, just like a regular Pillar/Tower would.
I thought about the HP.. 10 is not that much but something like 20 (what I originally had) is probably too much because if the opponent saves his cards and just plays 4-5 at a time, that will do 80-100 damage and kill you.
It's difficult to say what the balanced number would be. It could be more than 10 but I doubt it would be more than 15.
Just a point: there's almost no use upgrading it. Why? Because to your opponent, it's just another pillar/tower. It doesn't matter which. Why pay 1500 electrum to simply make the opponent think your card is a tower instead of a pillar? Unless it actually functions as such as well as its passive ability, that is.
Like is says in the card.. it looks and functions just like a regular Pillar/Tower. Towers give you +1 extra quantum when you play them.