Hi all. And thanks for visiting! 😘
Lore
Kulu Swimhunters are primarily hunters, they are members of a race of squid-like creatures that hunt in packs. They use their multiple tentacles, some of which are humanoid, to wield all manner of projectiles, to include spears, coral, and even fish.
They are very aggressive and are known to traverse oceans, lakes, and rivers, killing for sport and leaving a trail of destruction in their wake. They do not value gold or glory and will ally themselves with whoever promises the greatest opportunity to hunt and kill.
Battle
My opponent plays Earth Splinter hoping that his Unicorn Mustang will carry the battle. 
Result
Kulu Swimhunter along with Diemonshark manage to take out the Mustang and win the battle.
The link, if you would like to see the battle is here: Kulu 18 Mana Win
Strategy & Thoughts
Did the strategy work?
Yes, a good tank with some backline damage has a very good chance to win with low mana battles. I did not need healing or non-summoner buffs.
Would I change anything?
Probably not, because even with a miss, Kulu still did decisive damage.
Do you like Kulu Swimhunter?
While certainly not my favorite Water card, I can see it's potential in the sub 20 mana battles. I enjoyed using it for this challenge, and went on to win the following battle pairing it with a Scavo Hireling and a Sea Monster, here