Ceremonial Greatsword

Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 10 (2d6 + 3) slashing damage, and the target must make a successful DC 13 Constitution saving throw or take 5 (2d4) poison damage at the start of each of its turns. The target repeats the saving throw at the end of each of its turns, ending the effect on itself on a success.

Vomit Swarm (1/Day)

The imy-ut ushabti parts its wrappings voluntarily and releases a swarm of scarab beetles that follow its mental commands. The statistics of this swarm are identical to a swarm of insects, but with the following attack instead of a swarm of insects' standard bite attack:

Bites

Melee Weapon Attack: +3 to hit, reach 0 ft., one creature. Hit: 10 (4d4) piercing damage, or 5 (2d4) piercing damage if the swarm has half of its hit points or fewer, and the target must make a successful DC 13 Constitution saving throw or take 5 (2d4) poison damage at the start of each of its turns. A poisoned creature repeats the saving throw at the end of each of its turns, ending the effect on itself on a success.