Book of Revelations

First Chapter - Conquest:

A great spectral tome materializes near the caster as they read out the final epitaph of the target creature. Choose a creature within range that you can see. The target must succeed on an Intelligence saving throw or instantly suffer the effects of two levels of the exhaustion condition.

At the start of the caster's next turn the affected creature now suffers from the effects of the Second Chapter instead.

Second Chapter - War:

The affected creature now suffers from the effects of three levels of the exhaustion condition.

At the start of the caster's next turn the affected creature now suffers from the effects of the Third Chapter instead.

Third Chapter - Famine:

The affected creature now suffers from the effects of four levels of the exhaustion condition.

While the effect of the Third Chapter is applied the caster of the spell suffers from disadvantage on concentration checks to maintain concentration on this spell.

At the start of the caster's next turn the affected creature now suffers from the effects of the Final Chapter instead.

Final Chapter - Death:

The affected creature now suffers from the effects of six levels of the exhaustion condition.

The spell then ends.