Samus will be slowed by lava if Speed Booster is equipped, even with Gravity.

Requires:

{"or": [
  "h_lavaProof",
  "canSuitlessLavaDive"
]},
"Gravity",
{"heatFrames": 250},
{"lavaFrames": 190},
{"or": [
  {"and": [
    {"disableEquipment": "SpeedBooster"},
    "canDash"
  ]},
  {"and": [
    {"heatFrames": 50},
    {"lavaFrames": 50}
  ]}
]}