Ancient Apples add 7 Apples that were in Ancient time of Minecraft with each one being unique.
Apple of Fortunate: Gives you fortune and luck(it stacks), you can find it in village chests.
Apple of Mermaid: Gives Water breathing and faster swim speed, you can get from killing the Elder Guardian.
Apple of Darkness: Gives you silent walking(no vibration) and immunity to darkness effect, you can find it in Ancient City chests.
Apple of Knowledge: Gives you 100% bonus xp drops(it stacks), you can find it in Stronghold chests.
Apple of Greed: Gives you gold ingot every 1min(it stacks) and all piglins become passive, you can find it in Bastion chests.
Apple of Withering: Gives you immunity to fire and wither effect, you can find it in Fortress chests.
Apple of Hardening: Gives you armor and toughness, for every 2 Apples you eat you also gain resistance(you get 2% damage reduction, it stacks), you can find it in End City chests.
Most of them are rare to get.
you can use this mod in your modpack.
ps. the only way do die after getting full damage reduction is /kill
