Fargo's Mod/Pure Heart

The Pure Heart is a craftable Hardmode accessory exclusive to. In depth, it provides;

+20% movement speed, +20% max life

Immunity to Rotting, Bloodthirsty and, which includes: Darkness in the Corruption, Bleeding in the Crimson, Wet While raining, Flipped in the Underground Hallow, Hypothermia in a blizzard, Water Candle while a Blood Moon is active and the player is above ground, and On Fire! in the Underworld. Note that these effects only takes place initially while Eternity Mode is active, and will never prevent Lihzahrd Curse from applying to the player.

Attacks spawn mini homing eaters

Summons oscillating Creepers (max 5) that absorb/block damage and spawn every 15 seconds

While not moving, Creepers spawn faster