Opponents control at least five artifacts and/or enchantments.
({4} magic symbol) ({B} magic symbol) available.
Steps
Activate Kenrith's fifth ability by paying ({4} magic symbol) ({B} magic symbol) , returning Dockside Extortionist from your graveyard to the battlefield.
When Dockside Extortionist enters the battlefield, it and Blasting Station trigger.
Resolve the Dockside Extortionist trigger, creating at least five Treasure tokens.
Resolve the Blasting Station trigger, untapping it.
Activate Blasting Station by tapping it and sacrificing Dockside Extortionist, dealing 1 damage to any target.
Activate five Treasures by tapping and sacrificing them, adding ({4} magic symbol) ({B} magic symbol) .
Repeat.
Notes
Once you have infinite mana, you may spend it on Kenrith's other abilities.
Results
Infinite colored mana.
Infinite damage.
Infinite death triggers.
Infinite ETB.
Infinite LTB.
Infinite sacrifice triggers.
Infinite Treasure tokens.
Infinite lifegain triggers.
Infinite lifegain.
Infinite +1/+1 counters.
Put all creature cards from all graveyards onto the battlefield under your control.
Infinite card draw for any number of players.
Infinite draw triggers for any number of opponents.