Incenjucar
Legend
You have misread it.
It's an IF ... THEN statement.
It doesn't say that the gaze will reduce you to 25 HP.
Nope. It reduces your HP by 75. in 4E, once reduced to 0HP you only die when you fail three saves or take 50% of your max HP in damage. A 100hp PC effectively has 150HP to survive on outside of healing.
If you have 100hp, that means this ability takes off 25HP+50HP=75HP.