Firestorm threw KF into the Sun and she not only survived but she was devouring it's heat (causing a sun spot) and making the entire thing unstable. Firestorm tried stopping her by hitting her with a nuke blast and she just ate it. I don't think anyone on Team One is packing that kind of power output.
Effigy is Team One's only hope (to do something to KF that's BFR related) but if he don't, she's snacking on him too.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.