Tower Shield = 1/2
Rainbow = 1/3 of elemental cost because of QT and SN.
Tower Shield = .3/.6 (1/1 rounded up)
(Just an example)
Titanium shield costs 3 more for one damage.
Diamond shield costs 5 more for one damage.
Conclusion: Tower shield = OP / Titanium/Diamond needs a further cost reduction.
Alright, this buff was definitley needed, especially with the release of tower shield, however...
It still might pale in comparison to tower shield if that card stays at it's current cost, however.
Zanz said Tower shield's still getting balanced, so I don't think we should start making comparisons just yet.
Just mentioning it. I am NOT saying that
this is the case, since the new shield will be getting balanced.