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R Rare Lavalval Exlord X FIRE Level 8 [ WarriorSynchroEffect ] ATK 2900 DEF 200 1 Tuner + 1+ non-Tuner FIRE monsters When your opponent activates an effect of a monster on the field or in their hand (Quick Effect): You can destroy that monster, and if you do, inflict 1000 damage to your opponent

- Armed Dragon LV10 (DT05-EN058) - Duel Terminal 5-1st Edition - Rare : Toys & Games

Being a hybrid card also makes it a more diverse combo piece

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You could also word it so that it works only if your monster is currently battling another monster so it doesn't become a potential "burn for 700 for game" card (which Kalut is infamous for)