Gurkagh will step up to D8, grabs the chair and sweeps irt across at the creature.
Improvised two handed weapon - height advantage [1d20+3]=20+3=23; Damage [1d8+3]=5+3=8 Possible Crit
Crit Confirm [1d20+3]=13+3=16
Assuming he did not confirm the crit.. 8 damage as the creature is struck by Gurkagh wielding the chair.
[Gurkagh's forte, improvised weapon,, two handed large object will be d8 dmg]
Improvised two handed weapon - height advantage [1d20+3]=20+3=23; Damage [1d8+3]=5+3=8 Possible Crit
Crit Confirm [1d20+3]=13+3=16
Assuming he did not confirm the crit.. 8 damage as the creature is struck by Gurkagh wielding the chair.
[Gurkagh's forte, improvised weapon,, two handed large object will be d8 dmg]