Impossible and Colossal Drop Rates (Credits to Appbank)

Appbank is back with a giant experiment of one of Monster Strike's greatest mysteries!

This time, they are going to test the drop rates of Impossible and Colossal dungeons. The Colossal dungeon will be Yomi and the Impossible dungeon will be Tsukuyomi Zero.

For NA players, there are special in-game items that gives advantages during the dungeon. One of those items will give players 2 extra chests for drops. They will be labeled as "Item" in the table.

Here is the original article of the actual event: http://www.appbank.net/2016/11/05/iphone-application/1273549.php

Colossal "Yomi" Drop Rates

There were 257 clears in the dungeon. Here is the distribution:

Type of Chest	# of Chests	# of Drops	Drop Rate
Clear	257	79	30.74%
Speed	257	83	32.30%
No-Continue	257	0	0.00%
Item	410	107	26.10%
Luck (includes ones from non-ML monsters)	539	135	25.04%
Total	1720	404	23.49%

It has been officially stated that monsters do not drop from No-Continue Chests.

If you leave out the No-Continue Chests from the equation, the drop rate will be:

27.6%

Impossible "Tsukuyomi Zero" Drop Rates

215 clears came from this dungeon. Here is the distribution:

Type of Chest	# of Chests	# of Drops	Drop Rate
Clear	215	63	29.30%
Speed	215	63	29.30%
No-Continue	215	0	0.00%
Item	326	92	28.22%
Luck (includes ones from non-ML monsters)	589	171	29.03%
Total	1560	389	24.94%

Leaving out the No-Continue Chests, the final drop rate will be:

28.9%

Of course take this as a grain of salt. Sometimes you have better sessions and sometimes you don't. That is the art of rng!