Biggest kill in game?

[Dimestream]

During our operation to rescue the slaves of Fillydelphia during the Sunshine and Rainbows event, our Stalliongrad group knocked the ancient cybernetic dragon that was attacking Fillydelphia out of the sky with plasma cannons, supercharged spells, and ramming it into another destroyed Raptor. It was promptly finished off by Enclave Raptors, so even if we didn't kill it per se because it was regenerating 500 HP per turn, we still at least assisted.