To be honest, it's a dedicated card, so I can't say anything about it, but if I had to say, the performance of the Water Dragon itself is subtle, and the conditions are strict, so that's what it's like
Lets go over recommended skills for Photons, plus cards that you will want to add to your build
When it dies, you may put its +1/+1 counters on target artifact creature.) Modular 2 (This creature enters with two +1/+1 counters on it
If you pay two mana and discard the card, you can: "Destroy target artifact, enchantment, or nonbasic land an opponent controls
Dolmen Gate says prevent all combat damage that would be dealt to attacking creatures you control. This is a good representation of Karlachs ability to take reduced damage while raging