Magma Bloon

The Magma Bloon is a normal bloon which got the immunity to heat (like the black bloon), and is now covered with magma (this is impossible, but screw it). It has 200 HP and is immune to physical-based attacks. It has an ability:
 * Eruption: Erupts, causing a lava pool in a 196px range. It deals 1 damage for every 0.5 sec towers are in it (flying towers excluded). The lava poollasts 8 seconds, after that, the towers that were in it burn for 10 seconds, dealing 1 damage every second.