[ACG] Thunderstomp Spell from a Wand

[Fearspect]

Thunderstomp is a spell in the ACG, that reads:

Thunderstomp:

You stomp your foot or strike your weapon against the ground or floor, creating a ripple of power that you can use to trip a creature. Attempt the combat maneuver check to trip the target, but instead of your base attack bonus you can use your caster level, and instead of your Strength modifier you can use your spellcasting ability score modifier (Intelligence for magi and wizards; Wisdom for druids and rangers; Charisma for bloodragers and sorcerers). This does not provoke an attack of opportunity. This spell has no effect if you cannot reach the ground or floor, or if your target is not in contact with the ground or floor.

If this were cast from a wand by a class that does not have a spellcasting ability score modifier, such as a rogue, what would your spellcasting ability score modifier be? What if you were a spellcaster, but not amongst those listed in the spell description above, such as an Oracle?

Would it be dictated by the class that crafted the wand? Would it be no bonus, and you just use your BAB and STR since those will be higher than CL1 and +0 spellcasting modifier (since it says 'you can', not 'you must')?

[Nefreet]

Thunderstomp is a 1st level spell across the board.

The ability score required to cast this spell is only 11 (+0 mod).

So, if a Rogue uses UMD to activate a wand of this spell, it will always have a +0 modifier to the CMB check.

[Fearspect]

So, if his Str modifier were lower than 0, he could simply take a +0 on his CMB instead?

[Nefreet]

Ah. They did use the word "can", didn't they?

That brings up an interesting question: what is the default Strength score of a wand's creator?

I'm not sure the user of the wand gets the option, but if they do then a high Strength Rogue could have more than a +0.

And of course a low Strength Rogue could go with the wand's +0.