all-consuming

That consumes everything; that uses everything up.

Google is the all-consuming superpower on the Internet; soon everything will be owned by them.

A myth common to several cultures in the galaxy, Reapers were once imagined as space monsters that consumed entire stars. Archaeologists who searched for the sources of such myths found little besides the themes of all-consuming devils that are common to primitive cultures.

Totally engrossing, using up all of one's time and energy.

Where the Joker preys on our fears of random, irrational acts of terror, Bane has an all-consuming, dictatorial agenda that’s more stable and permanent, a New World Order that's been planned out with the precision of a military coup.

Brown revealed that his time as London Transport Commissioner has been all-consuming, describing it as "full-on".