Sacrosanct
Legend
It can be used this way at higher levels, except the problem is, the players never know when the moster is thst wounded, so it becomes a gamble, but it is a good tactic if used right.
That's where good DMing helps. Most good DMs I know narrate the battle. So you have an idea when the opponent is wearing down.
Unless you take the "full power at 1 hp" literally and no one ever shows any fatigue or wounds until exactly the moment they drop to zero hp. Then I suppose you're screwed
