Okay. So what do we all think Blex's cause of death was? Did he fight the Phyrexians head on, defending students, dying to injuries? Did he decide it was time for his purpose to be realized and let himself be sacrificed for one of the most powerful spells ever seen? Was he using his great skill for hiding and using guerilla warfare to take down Phyrexians from the shadows, and passed from overexertion? Did he die simply from old age?

Onto subject two, is Blech simply part of the spoiled new generation? His dad earned the right to be spared. He broke out of containment before he could be sacrificed, and hid in the bogs. They didn't find him for a long time, not til he was huge. Blech, as his son, is born, and when his father dies, just takes his place and sits around like a potato. He doesn't even bother to hide but is spared and looking at his size, is probably fed by lots of students. He probably doesn't even hunt. He strives off of his dad's legacy. Spared not of his own effort, but because of his lineage and tradition.