This dungeon opens at irregular times for an hour each time. There is no official announcement of the schedule. On the day of the event, the dungeon will be announced in the daily sign-in news. To find out your time, see Event Time Lookup.
This dungeon contains Pengdras of all five attributes and evolved Pengdras of all five attributes . take 2556 exp to reach max level, at which point they can be fused for 6000 exp (9000 for same attribute). don't need to be leveled. They can be fused for 30000 exp (45000 for same attribute).
This dungeon is more worthwhile than Metal/Gold/Jewel Dragons, because Floor 5 will drop an evolved Pengdra no matter what (worth 30000 exp before same-type bonus), and the small Pengdras can be evolved for another 30000 exp (for more info, see "Penguin Farming" below). Metal/Gold/Jewel Dragon dungeons will often net you all-3-star drops when there's no 2x King event. Overall, the average fusion exp gained from the Pengdra dungeon is higher than Metal/Gold/Jewel Dragons.
Actually, Pengdras can be evolved into big Pengdras. Due to the large difference in the amount of experience provided, most players will evolve Pengdras before feeding them to other monsters. They are at max-level immediately after evolving, so there's no need to level them further.
These are the materials needed for evolution:
Evo materials: Large numbers of Dragon Seed and Dragon Plant are required, which can only be amassed once a week from Thursday Dungeon. The various Metal/Gold/Jewel Dragons can only be acquired from the Urgent Dungeons (Metals are practically every day so they're easy to get; the three Jewels appear less frequently but are still fairly easy; Golds are hard since their dungeon rarely appears outside of events). However, you can also farm them from various low-level dungeons like Tower of Giants (which can also get you Dragon Plant).
Storage space: Because Dragon Seeds and Dragon Plants can only be refilled every Thursday, we must stock up a lot of Dragon Plants at once, putting pressure on storage space. In order to put your penguin farm to work, you need a lot of monster boxes to store Dragon Seeds, Dragon Plants, and Pengdras.
Carry out your plan like this:
Stock up as many max-leveled Pengdras and Dragon Plants/Seeds as you can. When the Urgent Dungeons open, you can immediately evolve your Pengdras with the Metal/Gold/Jewel Dragons you get.