This is one of the riddles from Wilhelm Binder's Flores Aenigmatum Latinorum (1857).
Quid Sum?
Mater alit vivum, vivens mox devoro matrem;
Matre tamen morior commoriente simul.
The vocabulary is keyed to the DCC Latin Vocabulary list. There are only two words in this poem that are not on the DCC list:
commorior, commorī: die together with
dēvorō, dēvorāre: devour, gobble up
alō alere aluī alitum: nourish
flamma -ae f.: flame, fire
māter mātris f.: mother
morior morī mortuus sum: die
mox: soon
simul: at the same time
tamen: nevertheless, still
vīvō vīvere vīxī victum: live
