Verb complexes
Mirja verbs can be extremely complex, and verb complexes can include a significant number of potentially separate lexical roots. In effect, Mirja seems to be in a state where its previous multi-word verb complexes were analysed as single words, resulting in not only significant amounts of noun incorporation but also multimorphemic sequences that straddle the boundary between one verb with suffixes and multiple serialised verb roots. Some subsequent changes have taken place since that wholesale reanalysis, though; the most notable of which is that noun incorporation has been restricted to only generic / nonspecific objects and specific objects must be separate words. It's also the case that Mirja verb complexes can now only have one marking for most grammatical categories (which now comes after any incorporated nouns); something that may not have been the case previously.
Basic verbs
Despite the relatively high ceiling on verb complex complexity, the most simple permissible sentence in Mirja is a single verb root. There is no need for a verb to carry any inflection at all—there's no agreement morphology, and all other categories either have an unmarked default or are allowed to be fully unspecified.
e
eat
'[subj] eats [it]'
VERB INFLECTION TABLE ETC
Serialisation
Mirja verb complexes can contain a number of apparently separate verb roots, or things strongly resembling them, within a single word.
simami-llha-nako-vije-t
drive.car-to-be.able-easily-PAST
'was easily able to drive there'
Here, -llha behaves mostly as an applicative and is less clearly an independent verb, though it seems to be derived from one—it can take 'its own' incorporated objects much like other less clearly grammaticalised serialised roots. -vije is one of a class of manner-providing 'roots' that never head their own verb complexes, but are difficult to distinguish from verbs that simply never appear outside of serialisation. Nako is more potentially separate, as while it provides an apparently very grammatical potential mood meaning, it can appear on its own in short exchanges, such as nakowwe 'can they?' nako 'they can' and similar.