The Delightful Reaper is just going around assimilating everyone it sees in it's path using it's scythe

Delightful Reaper: Assimilate! Assimilate! Assimil- It gets interrupted by Billy who's apart of the Delightful Reaper itself humming

Billy: La La La La! La La La La!

Delightful Reaper: Will you stop that?! Ugh! I wish I had never assimilated you in the first place!

Then the Delightful Reaper spots you as you stand before them

Billy: Hiya there! Did you come to assimilamamamaimate or whatever it is we're doing?

The Delightful Reaper stares at you, Including Billy