IBT result: 4 + 1 (dagger) - 1 (stage/class rule) = 4 (PASS) 
Under FF6 formulas:
2 x 3 (current stage/level) x 4 (system roll) x 4 x 4 x 4 x 4 (Setzer's fixed dice) = 6144 damage.
Tree terminated.
(There was no indication of any recent wildfires here, but the dead tree looked like it had been killed by one...)