Sources

Dark Steel Boots — Jump Upgrade

Three tiers of jump upgrade can be applied to Dark Steel boots.

Level	Config	Description
Jump I	darkSteelJumpOneCost	Single-level jump boost
Jump II	darkSteelJumpTwoCost	Double-level jump boost
Jump III	darkSteelJumpThreeCost	Triple-level jump boost

Rocket Fuel Fluid

Standing in Rocket Fuel fluid grants jump boost effect:

• Effect ID: Potion.jump.id
• Duration: 150 ticks
• Amplifier: 3 (level IV equivalent)

Upgrade Details

• Applied to: Dark Steel Boots only（player.getEquipmentInSlot(1) / DarkSteelItems.isArmorPart(item, 3)，JumpUpgrade.java:33,62）
• Jump I / II / III 是 3 个各自独立的升级物品（new JumpUpgrade(unlocName, level, levelCost)，JumpUpgrade.java:55-57），各自带 level 字段
• ⚠️ 订正：原文「Requires energy upgrade to be present before installation」与「Upgrades are cumulative (Jump II requires Jump I)」均无法核实——源码中不存在前置升级判定，也无累积逻辑；同一位置的匹配只按 unlocName 全等（JumpUpgrade.java:82），因此三档是互斥而非叠加。

Rocket Fuel Fluid

Rocket Fuel is a fluid created via Ender IO’s distillation recipes. When an entity stands in a block of Rocket Fuel, they receive a strong jump boost effect (amplifier 3) that lasts 150 ticks (~7.5 seconds).