Netherburst

Netherbursts are part of the Dark Tower structure in the Twilight Forest. They appear to be large Nether "meteors" (not Falling Meteors meteors) that have crashed into the tower. They are made up of Netherrack, Soul Sand, Lava, and Fire, and may also contain Blaze spawners. They can be very dangerous/annoying to an adventurer because:

• They can sometimes cut through staircases and treasure rooms, blocking your path upwards or destroying the treasure
• There are large gaps where an unsuspecting adventurer may fall to their death
• The Blazes can prove a dangerous challenge
• Carminite Ghastguards are able to see and shoot you
• Fire and lava may still spread after the Tower has generated