This is for indicating the marked number is large; "no fewer than" or "as many as". Nothing is omitted in this sentence, but the verb that normally comes after the is found at the beginning of the sentence (/anastrophe). In the normal word order, the sentence in question is:
> (→) ****
>
> Indeed, there are (not one but) TWO spares (←I keep coz some commander I know destroys his unit every single time)!
>
> ( is indirectly referring to "you".)