I agree, but let's pass out the stuff that turns it to stone just in case.
I'd say one to Rayne, Roan, Talco and Valene. Lothor has his wipe and rest of us have magic.
Also we should position ourselve maybe 50 yards apart.
Cor need a bless spell or something to help his speech.
I'd say tell the dragon we were on a mission to save the dragon queen and got cast back in time. We need to return to save her and there is a great magic item here we need to fulfill the spell to send us back.
Maybe Allanan doesn't need the heart, just magic from the heart. Can he draw that magic off with killing the dragon if the dragon is willing to help?
If so there's a new option.