"Clash of Clans" fans are only a month away from the ClashCon, which will be held in Helsinki, Finland on Oct. 24. Game Zone reports that mobile game development company Supercell has big update announcement for Oct. 24, but a minor update is on the works, presumably available this week.

In a video released on YouTube, Supercell gave a sneak peek one of the new features, the Level 7 Lightning Spell at Town Hall 10. This would mean that Level 6 Lightning Spell will be available at Town Hall 9, and along with Level 5 Lightning Spell, will have their damage decreased.

Level 7 Lightning spell will increase power and can make lightning bolts strike close together for better accuracy, which means that aiming will be more important. The last major update for the game was "The Dark Spell Factory" in July that provided players with new dark spells, as per a previous report from Game Zone.

The new dark spells are Earthquake that damages all nearby buildings and walls, Haste that speeds up the movement of your attacking units and Poison that slows down and drains the health of defending troops. All the new spells are created via the "Dark Spell Factory."

In another sneak peak, Supercell, via Game Zone, revealed that there will also be some improvements on Poison and Earthquake spells as well as the introduction of the new use for the Freeze spell. Poison spell can now level up in damage if it stays longer on the ground. It also increases damage to units within the poisonous radius while reducing the attack rate of defending troops.

On the other hand, Earthquake spell can inflict more damage to where it has been first cast. If it's on top of a building, it will cause 25 percent damage regardless of hitpoints left in the building. And if a building has only 20 percent health left, the Earthquake spell will fully destroy it but too many of it will have diminishing damage.

Freeze spell can now be used to freeze air troops. Among other rumoured additions for the new update this week or for October during the ClashCon are the Town Hall Level 11, which is rumoured to be released in 2016, a third hero that is used as an April Fools prank, new Dark Barracks troops for the four squares that say "coming soon" and Level 10 Walls, according to Gotta Be Mobile.

You can view the second sneak peak video below and join in the discussion in the Supercell Forum.