Why is he even arguing? If it's a big dangerous undead thing and only Holy Magic is effective, and he's the only one who can use it, duh it's upto him. Another annoying trope, where OP protagonists refuse to acknowledge that they're OP and play dumb, like it displays their Japanese Humility™.
Glad to see Brantark has correct priorities, "RECOVER ALL THE BONES!" Don't miss loot! That's happened to me before in a game, where I offed something and it ragdolls off a cliff.