Can you freely choose the CMB mode for Chain of Perdition?

[Pigglebee]

I have some questions about the Chain of Perdition spell ( http://paizo.com/pathfinderRPG/prd/ultimateCombat/spells/chainOfPerdition.h tml )

Once you've cast it, it attacks once per round for its duration and oracles use their charisma bonus, so far so good from all the rulings I've found.

My questions are:
- Who does it attack? Can you specify a target within reach or is it random? (assumption: I get to pick)
- What CMB does it do? Random or pick? (assumption: I get to pick)
- Once the CMB is chosen, does it stick doing that for its duration or can you decide each round? Is that a move action, just like moving the chain or is it just something you do as in "ok, my chain tries to reposition target X" (assumption: no clue at all)

[Mathmuse]

I once played an oracle for whom Chains of Perdition was her favorite combat spell. I had not realized that I had invented my own answers to your questions.

I treated the original evocation spell as giving a command to the floating chain of force: blind, entangle, drag, reposition, or trip a particular creature. After one combat maneuver attempt, it required a new command for another combat maneuver on the same or another target. The move action to request that it move also included giving it a new command. Thus, using the chain actively required spending a move action every turn to keep it active. However, after a successful entangle, it would remain in place entangling the creature without further commands.

[Valandil Ancalime]

Why do you think any of those would be random?

Does "- What CMB does it do?" mean; what combat manuver does it use?

[Pigglebee]

Valandil Ancalime wrote:

Why do you think any of those would be random?

Does "- What CMB does it do?" mean; what combat manuver does it use?

Ah yes, that is what I meant. should have used 'CM' since that is that actual abbreviation. "What combat maneuver does it do'.

Come to think of it, it being random would be kinda weird. So it more or less boils down to: Is it a fixed CM once chosen or can I change it every round, and if I can, does that cost me a move action?