Burning/Poison/Cold damage

[Xargon]

Yes, both of those are very useful for the burn/cold effect. The spell blizzard is also extremely powerful. With a bit of int and destroyer 3, a lvl3 blizzard hits for 4k damage and freezes everything. Against enemy heroes who have their troops splitted into 10 stacks or something like that, that battle can be almost over after the first round: cast something, then blizzard, then afterwards lord of the north (so the blizzard won't destroy the shards). This makes even invincible heroes very easy (but will probably change at least a bit later in the game).