Like most Magic: The Gathering cards, the value of Akawalli, the Seething Tower depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (The Lost Caverns of Ixalan)
All right, lets get crackin
The first is its triggered ability, which allows you to quickly get rid of any non-Salamander creature regardless of how big or powerful it is: "When Amphin Mutineer enters the battlefield, exile up to one target non-Salamander creature
You get to protect it, and re-buy the EtB
And finally, one of my favorite flavor hits of the set: In Too Deep
I love having incidental value on lands as a way to use extra mana more efficiently and this card delivers just that