Objectively

• Update to 1.21.6

This mod has the following features:

• Limit scoreboard queries with the gamerule scoreboardQueryFrequency. Set this value to the number of ticks between queries
• Allow automatically adding players to objectives using /objectively <objective> true
• Add a criteria type for max health attribute of players

This mod has only been tested on Minecraft 1.21.4, but likely works on older versions as well