There are 5 monsters that are impossible to defeat in this list:
Elder Hydra: 10000 HP, 50 AP, 60 DEF, attack cycle 5 can cause spark, burn, frost, and nature
Award: 1000000 lionheart coins
Elder Dragon: 20000 HP, 60 AP, 50 DEF, attack cycle 5 can cause burn
Award: 2000000 lionheart coins
Ancient Golem: 30000 HP, 70 AP, 65 DEF, attack cycle 5 can cause nature
Award: 3000000 lionheart coins
Elder Earth Slicer: 40000 HP, 80 AP, 70 DEF, attack cycle 5 can cause stun, burn, and bleed
Award: 4000000 lionheart coins
Elder Death Song Dragon: 50000 HP, 80 AP, 80 DEF, attack cycle 5 can cause blind and sleep
Award: 5000000 lionheart coins
Elder Hydra: 10000 HP, 50 AP, 60 DEF, attack cycle 5 can cause spark, burn, frost, and nature
Award: 1000000 lionheart coins
Elder Dragon: 20000 HP, 60 AP, 50 DEF, attack cycle 5 can cause burn
Award: 2000000 lionheart coins
Ancient Golem: 30000 HP, 70 AP, 65 DEF, attack cycle 5 can cause nature
Award: 3000000 lionheart coins
Elder Earth Slicer: 40000 HP, 80 AP, 70 DEF, attack cycle 5 can cause stun, burn, and bleed
Award: 4000000 lionheart coins
Elder Death Song Dragon: 50000 HP, 80 AP, 80 DEF, attack cycle 5 can cause blind and sleep
Award: 5000000 lionheart coins