He was serious about destroying the mortal world.
There is no other way to keep the Other from destroying everything.
The battle of Tarutino obviously did not attain the aim Toll had in view--to lead the troops into action in the order prescribed by the dispositions; nor that which Count Orlov-Denisov may have had in view-- to take Murat prisoner; nor the result of immediately destroying the whole corps, which Bennigsen and others may have had in view; nor the aim of the officer who wished to go into action to distinguish himself; nor that of the Cossack who wanted more booty than he got, and so on.
If the Cossacks did not capture Napoleon then, what saved him was the very thing that was destroying the French army, the booty on which the Cossacks fell.
Because you're single-handedly destroying the universe.