The single most efficient fracter in the game. It has limited uses, so it's best to have a backup or a way to "refresh" it (Scavenge or Test Run after trashing it). The influence cost is prohibitive to anybody but Shapers, but they're likely to get the most use out of it anyway.
Combos extremely well with London Library.
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MidgardSerpent
It does pair with the library except all the clicks that costs.
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FightingWalloon