Does it have a blind spot?

Like the Seige Tank (in Seige Mode), it can't attack the unit that is too close to it. So does his go for the Colossus as well? or can it attack either way, close and far.

And does it do damage to ally units?

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Q u o t e:
Does it have a blind spot?

Like the Seige Tank (in Seige Mode), it can't attack the unit that is too close to it. So does his go for the Colossus as well? or can it attack either way, close and far.

And does it do damage to ally units?

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It does not currently have any blind spots. On a side note, we are working to buff up the Colossus a bit more to have more burst attack (more attack damage but slower attack speed). Previously, in order for the Colossus to be very effective, a Protoss player would need several of them on the field attacking at the same time. This change should make the Colossus more effective with smaller numbers.