I really don't want to complain, cuz this dungeon is the best thing we've had in a long time, BUT.... the yellow 3* bricks are the rarest.
I literally grinded for 7+ hours give or take, and collected 20 -24 yellow bricks. I need 110 for G. LoL.
Not to mention, Cosmic LoL will need them too.
And if someone has Cosmic Shinobi, there's another Gunner.

Lastly, Dec. 2nd is Cyber Monday and the Cyborg Eddie will be Awakenable..... there's another one who uses yellow bricks, 4 toons total.

On the brighter side, this dungeon is a "hotbed" for purple bricks! Thanks Dev.... much appreciation. 👍