Whoo! Getting closer.
It still needs some more in-depth text-- it looks a bit bare with all that space. Imo, in every card strategy text mention at least one of the following: PC, CC, Denial, the other cards in the deck, the effects we are trying to prevent/deal with, our win condition.
So for diamond shield, for example:
+3 Damage Reduction! A key card, Diamond Shield reduces enemy damage from creatures and weapons to a more manageable level. Play this as soon as possible, unless you expect permanent control and cannot replace it. In particular, be on the lookout for pesky goblin steals. If PC is likely, then wait for a Protect Artifact.
That's still not enough text, but something more in that direction.