The blazing corpse moves when Ash fires his 3 shots at it, amazingly the later two of the bursts of ammunition bounce of a strange running steely substance on its firey bone (Nat 20, Hit, No Crit, Miss , Miss) and stumbles to its feet hissing a strange rhyme as a blazing sword of fire appears in its hand. As it rises you realise its speed is far greater than would be expected from a burning corpse, especially one that seems to be coated with molten metal. The corpse seems largely unphased by the large pile of metal slugs stuck in its bones. 
" Ancient Warrior Doomed To Burn
  Watched the Fire Churn
  Came the Time to Repay
  The Debt Earnt within his Day
  Guard This Door I was Bid 
  But Within the Noble I Hid
  Foolish Ones feel the Wrath 
  of Poor Burning Nath. "
Filia's sudden burst of laser like breath seems more effective leaving a noticeable charring on the creature. 
With a blinding blur of speed the strange metallic firey corpse hurls a bolt of fire at Ash, which strikes Ash searing him for a massive amount of damage. (Ranged Touch Attack vs AC 15,4 Rolled, Hit, 6d6 (21) Fire Damage).  
Initiative: 
Ash: 18
Blackmage: 13
Filia: 12
Yuna: 11
Samanosuke: 10
Deedlit: 9
Dalamar: 9