The 幸运马掌 is an 配饰 that negates 掉落伤害. It can be found in 漂浮岛 宝箱s, or by looting a 天空匣 that is obtained by 钓鱼 on the 漂浮岛. Lucky Horseshoes can be very handy when exploring 裂隙s because the player will not need to worry about being damaged from long vertical drops.
Once the player has found a 抓钩 and/or a 云朵瓶, the Lucky Horseshoe loses some of its usefulness, and can potentially be swapped out, although having one equipped is always a good safeguard, as the 抓钩 can take some time to retract, and the 云朵瓶 can only be used once per fall. A set of 翅膀 seems to remove any and all usefulness of this item, saving you an item slot, as it also negates fall damage completely, but Lucky Horseshoes can be accessed much sooner than any of the different Wings, seeing as wings are 困难模式 配饰.
Beware that this accessory does not work when the player is suffering from the 恍惚 debuff, which also incurs much more severe fall damage than normal.