Mercy
Trusting Miss Murder and Doc Rhino to take care of the threat to the south, Mercy again turns to help Chains. Summoning a glob of ice, she tosses it quickly at the northern-most dragon.
SpoilerAll things being equal, she's aiming for D1. If D1 is taken care of by the time her action takes effects, she'll move to throw it at one of the others.
Orb of Cold:
Touch attack (1d20+7)[26]
Cold Damage (11d6+3)[51]
Fortitude save DC 20 or blinded for 1 round.