Masteorogily

"Masteorogily is a Corruptive Mode version of the Brain of Cthulhu. He can be summoned by defeating the Wall of Corruption and the message 'The Crimson grows...'should appear at the bottom and use Bloody Spine in the night to summon him."

Stats
"HP: 10,000""Attacks:""Crushing Story : 50/100""Remembrance of the Past : 150/200""Crimtane Ray : 40/100"

Drops
"100-550 Advanced Crimtane Ore 100%""55 Advanced Tissue 100%""One will drop the following 10.5%""True Blood Butcherer 10.5%""Brain Lobes 10.5%"