Yes.
Any questions? Let's see if we can help you
What happens if a unit under the effects of Spirit of the Thermapleurus and the second alteration charges against an enemy unit and suffers stress due to Intimidating? Does the target of the charge flee and the charging unit loses the charge?
Yes.
How does the second alteration of the spell Summon the rock work?
The spell has a single target. The alteration grants it the property Remains active to the effect: at the beginning of its activation, the target of the spell and all the units within 5 strides of it suffer the slowed state. If the target of the spell never activates, nobody ever gets slowed.