I believe the IMMORTAL and unblockable ghost summoned on kill from the Final Gasp rare mob mod can target and kill your Ichor pump in blight encounters. Seems like an oversight :
POE 3.6 Duelist] Best Synthesis Molten Strike Champion Build (PC,PS4,Xbox) - Budget, Tanky, League Starter - poecurrencybuy.com
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HOA Guardian - Wave 25-30 Simulacrum : r/PathOfExileBuilds
Path of Exile: Best Builds List – Expert Game Reviews
Duelist - [3.3] The Coward's Charge | Charged Dash Champion avoidance tank (97% attack, 89% spell) - Forum - Path of Exile