I think that Dagon is a good item. 3000 gold for a nuke may be expensive, but it is great for those heroes that just can’t kill people easily early game. As the game progresses, it loses it’s potential, and it’s almost never upgraded.

I think that the Dagon upgrades should improve things other than damage. Here are some ideas for Dagon upgrades:

Minor Stun: It’ll stop channelling spells, but might get completely abused by spammers.

Mana Burn/Silence: Drains mana equal to damage (or silence for X seconds), it might make dagon more of a initiator, rather than a finisher.

Debuff: It’ll remove a buff from the target unit.

Amplify Damage: Mabye something like Orchid Malevolence’s Soul Burn. Increase damage on target by X%.

So it’ll be like lvl2 Dagon micro stuns, LvL3 mana burns, Lvl 4 Debuffs, LvL5 Amplifies damage, whatever. Ideas or opinions are appreciated.

(http://www.dotastrategy.com/forum/ftopic11896.html )