Dark spells and dark spell factory. (DARK MARKET)

We have dark troops, why not far spells?

Building name: Dark Market

Building Price: 10000 (dark elixir)

Name of Spell: PLAGE

Training Cost: 500-1000 (dark elixir)

Targets: Any regular troops, dark troops are immune, on the contrare dark troops increase 5% when attacking in the splash area.

Effect Type: slowly kill anything that touches

Damage Type/Amount: 23 damages per 30-60 sec

Training Time: 30min

Description: A dark spell that as soon it touches ground everything that touches turns black. Slowly damaging everything in its pad.

Research/Spell Levels:
Lv2:10000 increase of 15%

Lab Level:9

I agree just not with the name

I could not come up with anything better than that. What are your thoughts??

:3 Dark Spell Factory < this name's Great