Much too many people complain about this shield. Easy target for PC, if it isn't Enchanted, of course, but that only lasts for three turns.
Easily countered by: Deflagration / Explosion, Shard of Focus, Shard of Freedom, Shard of Wisdom, Steal / Improved Steal, and Momentum / Unstoppable. If your deck doesn't run any of those, a stall might be able to beat it.
The only thing that can hold a chain up from what I've seen - is a Duo, or mono Aether. Rainbows don't hold them up too good... But can do it if they wanted I guess...
Any deck that has enough aether can hold the chain I suppose...