So this is a somewhat tricky card for newer players to see the usefulness of, but in my opinion it is a very good card. It is (almost) purely a defensive card, meant to absorb and evade enemy attacks while other cards deal damage.
It can be used as a tank in a low mana battle or once it is leveled up more, especially if you back it up with heals and extra armor. At level 1 its speed, relative high HP and flying ability all contribute to its defense. (Speed and flying give it a higher chance to evade enemy attacks.) Though it is also a very good in the 2nd position acting as a backup tank - absorbing attacks from snipe or the blast ability or when your primary tank falls.
As you level it up it will gain stats that all contribute to its defense, speed and HP. Then at level 4 it gets Magic Reflect - where it can actually do a little damage by returning magic attack to the enemy at half damage. Later on it gets Divine Shield -absorb 1 of any attack. And finally Phase - evade magic attacks just like melee and range.
When this card fist game out a couple months ago I leveled it up to 5 - its Max silver level. And have enjoyed playing with it a lot. Hope that helps. Thanks for post.