Hey there, fellow Terraria explorers! When facing enemies underground, be sure to keep an eye out for bats and skeletons. Bats are quick and can swarm you, so a good strategy is to create some space and take them out one by one. Skeletons can throw bones at you, so using a shield or staying mobile can help you avoid their attacks. Always be prepared with plenty of healing items and buffs to make your underground adventures a success! Happy exploring!