Lava Burst deals X damage to any target. If Lava Burst would deal damage to a creature, that damage can't be prevented or dealt instead to another permanent or player.
10/1/2008 Prevention and redirection effects will have no effect on damage dealt by Lava Burst to a creature. However, they will work on damage that Lava Burst would deal to a player.
10/1/2008 A creature dealt damage by Lava Burst may be regenerated.