Whoever hits you burns. Purely defensive: you trigger nothing, you punish.
There is no button to press. When a player hits you in melee, he burns for 2 seconds, with a 4 second cooldown between two triggers.
The Magma does not win a fight on its own: it makes the fight expensive. Against an opponent who spams clicks and never breaks off, the burns stack up and force him to drink more often than you do.
It is the most passive kit on the server, and probably the most underrated in group fights.
Place in the progression#3 cheapest kit out of 40
About 25 kills to unlock it, at ~20 coins per kill.
Two paths, one kit
500 coins, earned in combat. That is the normal path, and the one most people take.
Identical for all 40 kits
Everyone leaves spawn with the same gear. Only the ability changes.
In the same price range
A bow and a full quiver. You harass, you finish, you do not hold the melee.
500coins
Immune to fire and lava
500coins
Runs faster on sand
500coins
It is waiting for you in game
Log in, chain the kills, and it is yours. 500 coins goes faster than you would think.