It might be a better choice for Living End to return to the black creatures instead, so it can make use of Grief
Ultimately, he starts experimenting on himself too and he becomes an insectile aberration a Human Insect hybrid
Theyre also extremely powerful archetypes, and need to be kept in check
If you want to play a longer more mid-to-lategame style deck in Mono Red that interacts more with the table, well, it gets more challenging because it makes Mono Red's inherent weaknesses more glaring: subpar card draw and ramp, subpar answers to creatures, minimal options for enchantment removal, commander protection, and recursion, things that get more pronounced as the game progresses
Its hard to block profitably, but at the same time, its risky not to block it