While the ability to dig through your deck via this wheel-like effect is nice, Kayla then allows you to play a one-mana artifact, a two-mana artifact, and a three-mana artifact from among the discarded cards without paying their mana costs
And then you make a 4/4 flyer that's swinging for the turn as well, and if it this, that's eight damage to them plus the four, for a grand total of twelve life differential on the fourth turn after casting it on turn three
Kenrith, the Returned Kings ability to bring creatures back from the graveyard also allows players to reuse powerful cards like Dockside Extortionist, and keep threats on the board
Then you can flip him when you control at least four Wizards like him and tokens and others too and then that creature type will double their damage
For cards 1993 to 1998: Sets released between Arabian Nights (1993) and Exodus (1998) will need set code lookup
This also makes these effects not unique enough to mention for the series, and I feel with the recently released Bushwhack, it and similar cards have already been placed on people's radar in regards to EDH
