Rest in peace, Sion's passive.
With Storm Raiders gone, his passive has almost zero kill pressure. R. I .P
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However a new passive rises to shine down upon the Rift and all its structures:
#SOUL FURNACE PASSIVE
Hello 500+ HP from Overgrowth, hello 500+ damage 
babies, hello 1200 damage Demolish every 45 seconds.
Two words: Glacial Augment