Joostmod/Cactoid

Cactoids are neutral Desert enemies. When attacked, all Cactoids within a 25 tile radius and direct line of sight become hostile. They will also become hostile if the Flowering Cactoid is within 100 tiles. When hostile they follow a slower version of the Unicorn AI. Corrupt/Crimson variants are always hostile, with the weaker Cactites following the Fighter AI instead. Corrupt/Crimson Cactites do not spawn in hardmode.

When under the effect of the Cactoid Commendation, regular Cactoids/Cactites undergo a drastic shift in AI to that of a minion. They will line up behind the player and move into nearby enemies to attack. Cactoids/Cactites attack every 2/3 rds of a second and Cactites can damage up to 3 enemies while Cactoids can damage up to 4 during that period. They can be damaged by enemies every 1/3 rd of a second.

Trivia

 * Cactoids and Cactites are a reference to the enemies from Final Fantasy XII with the same name.