The availability of specific cards can fluctuate dramatically based on reprints, banned list updates, or shifts in the competitive landscape
You may reveal an artifact card from among them and put it into your hand
Sagas are a fun card type to play with Muldrotha as well, since you can almost immediately recycle them
DArgenio writes at Escapist Magazine, others have suggested cutting down the data to just one card type at a time, such as creatures, which should help the network recognize patterns and even flavor among them
A handful of them are extremely popular, like Chun-Li and Ryu, who are both present in their own unique cards
Of course, it helps when they boast an impressive ability like Rishadan Port or ramp you tremendously like Scorched Ruins from Weatherlight