Heroic Dungeon of 4-Star Monster Undine with Wind Attribute Revealed! Summoners, The Heroic Dungeon of 4-Star Monster Undine with Wind Attribute will be open for 3 days, from July 4th - July 6th! Heroic Dungeons can be found at the Cairos Dungeons, but be sure to be prepared before you enter, because these Dungeons are crazy hard! The Heroic Dungeon has a total of 3 stages, and by clearing the stages you can loot the Summoning Pieces for the designated Monster. You may or may not loot a Summoning Piece at the 1st Stage, but you are guaranteed to loot Summoning Pieces at the 2nd and 3rd Stage. If you want to check out how many Summoning Pieces you've collected, just go to the Summonhenge and tap Summon Monster on the bottom of the Menu. If you've collected all 50 Pieces, you will see that a new button will pop up in the Summon Menu. If you think you're up for the challenge, march to the Heroic Dungeons and prove yourself! Collect the Summoning Pieces and Summon the 4-Star Monster Undine with Wind Attribute! Good luck!