Does a Thor take 3 or 4 volleys to kill two (2) hydras?
Four
The way multiple attack work is:
- the weapon acquires a target
- the weapon fires its attacks (all of them)
- the animation for the attacks is displayed (usually a projectile, but not in the case of a Thor)
- the projectile collides
- the damage is applied on a per projectile basis
- the unit take decides if it is dead