Forum:Jigen Bakudan Help

I'm trying to get envolved in the power of Fire/Pyro types to strengthen my deck, but my card Jigen Bakudan is confusing me.If I use this effect, will I have to pay the Life Points for my destroyed monsters if they're in Defense mode? (I'm a little rusty at my skills, but I recall that if your monster is in defense mode, if destroyed, it won't cost you life points.) Jigen Bakudan's Effect reads: [Pyro/Effect] FLIP: After this card is flipped, offer it as a Tribute during your Standby Phase to destroy all monsters on your side of the field and inflict Direct Damage equal to half of the total ATK of the destroyed cards (excluding this monster) to your opponent's Life Points.