Where to farm Coal

7 stages drop Coal, ranked by energy per item.

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Every clear(3)

  • Brushfire (Insane)Island of Ash
    ★7
    200 energy
    Drops: ×6 9.5%, ×4 36%, ×2 5%Avg per clear: 2.09Energy each: 96
  • Brushfire (Veteran)Island of Ash
    ★5
    150 energy
    Drops: ×3 17%, ×2 29%, 5%Avg per clear: 1.12Energy each: 135
  • Brushfire (Normal)Island of Ash
    ★3
    100 energy
    Drops: ×2 12%, 39%Avg per clear: 0.62Energy each: 163

Limited clears per run(4)

These maps allow a set number of clears each time they run.

  • Magma Tunnel Area 11 clear per runJinfore Volcano
    ★8
    200 energy
    Drops: 26%Avg per clear: 0.26Energy each: 769
  • Magma Tunnel Area 21 clear per runJinfore Volcano
    ★8
    200 energy
    Drops: 23%Avg per clear: 0.23Energy each: 870
  • Magma Tunnel Area 31 clear per runJinfore Volcano
    ★9
    200 energy
    Drops: 20%Avg per clear: 0.2Energy each: 1,000
  • Magma Tunnel Area 41 clear per runJinfore Volcano
    ★9
    200 energy
    Drops: 17%Avg per clear: 0.17Energy each: 1,176

Once per run(28)

Tower floors and gauntlet levels give their reward on the first clear each time the event runs.

  • Floor 33Golden Tower
    ★10
    200 energy
    Reward: ×20 100%
  • Three Omens Lv.73 clears per runAttack of the Omens
    ★10
    90 energy
    Reward: ×8 100%
  • Red Alert 23 clears per runBaron Seal Strikes
    ★8
    60 energy
    Reward: ×5 100%
  • Excavation Lv.73 clears per runGigahaniwan Strikes!
    ★10
    90 energy
    Reward: ×7 100%
  • Rampage Lv173 clears per runLe'Grim Strikes
    ★11
    200 energy
    Reward: ×15 100%
  • Cosmic Juggernaut Lv.43 clears per runHorrorpotamus
    ★9
    70 energy
    Reward: ×5 100%
  • Wandering Lv.43 clears per runBig Peng Z Strikes
    ★9
    70 energy
    Reward: ×5 100%
  • On Mighty Wings Lv43 clears per runMega Menace
    ★9
    70 energy
    Reward: ×5 100%
  • Blessing Lv.43 clears per runDivine Archangel Strikes
    ★9
    70 energy
    Reward: ×5 100%
  • Showdown! : Part 83 clears per runTest of Might: "Ranma 1/2"
    ★6
    80 energy
    Reward: ×5 100%
  • Sudden Death Lv.83 clears per runManbosaki Strikes!
    ★7
    80 energy
    Reward: ×5 100%
  • Showdown! : Part 83 clears per runTest of Might: Ranma 1/2
    ★6
    80 energy
    Reward: ×5 100%
  • 8th Song3 clears per runElectric Diva Strikes!
    ★7
    80 energy
    Reward: ×5 100%
  • Pity Gift Lv.83 clears per runAttack of the Lonely Hearts
    ★7
    80 energy
    Reward: ×5 100%
  • Grail War: Day 83 clears per runGauntlet of Servants
    ★8
    90 energy
    Reward: ×5 100%
  • Floor 33Heavenly Tower
    ★10
    200 energy
    Reward: ×10 100%
  • Floor 3Infernal Tower
    ★6
    100 energy
    Reward: ×5 100%
  • Floor 6Infernal Tower
    ★7
    110 energy
    Reward: ×5 100%
  • Floor 9Infernal Tower
    ★8
    120 energy
    Reward: ×5 100%
  • Floor 13Infernal Tower
    ★9
    140 energy
    Reward: ×5 100%
  • Floor 16Infernal Tower
    ★9
    150 energy
    Reward: ×5 100%
  • Floor 19Infernal Tower
    ★9
    150 energy
    Reward: ×5 100%
  • Floor 23Infernal Tower
    ★10
    200 energy
    Reward: ×5 100%
  • Floor 26Infernal Tower
    ★10
    200 energy
    Reward: ×5 100%
  • Floor 29Infernal Tower
    ★10
    200 energy
    Reward: ×5 100%
  • Floor 33Infernal Tower
    ★11
    200 energy
    Reward: ×5 100%
  • Floor 36Infernal Tower
    ★11
    200 energy
    Reward: ×5 100%
  • Floor 39Infernal Tower
    ★11
    200 energy
    Reward: ×5 100%