Hex and Healing Rain, next turn play this and get them back. Great card.
I only like to run 1 of each Shaman spell in most decks this makes it WAY more consistent.
If I Electra + healing rain on turn 6, do i get 2 healing rains back when i drop this?
Unfortunately, I think you will only get one copy back, since Krag'wa, the Frog says "... you played last turn".
Also, very nice synergy with Haunting Visions, because you get back your Haunting Visions AND the discounted Spell you played last turn. You could, for example, go Haunting Visions into Healing Rain and coin Volcano on T7 for board clear and heal, and then get your 4 spells back the next turn. Of course this is an ideal scenario, but even just getting back 2 spells is insane value.
In my view, this is basically a way to get 2 extra lava bursts for burn shaman. Most other relevant spells either can't cover the overload cost for more than one copy or arent worth copying over lava burst. Now don't get me wrong having two extra lava bursts can be excellent, but it seems limited in function to me.
Honestly, what ? What would you play in Shaman other than Krag'wa ? I feel i must tell you that you can not play Zul'jin in shaman decks, since that point apparently has eluded you. Saying one will be played and the other will not, is downright dumb. They are both great cards. Zul'jin is a build around, Krag'wa is pure value.