Kenrith's first ability by paying ({R} magic symbol) , giving creatures you control trample and haste until end of turn.
Activate
Garth One-Eye by tapping it, causing you to pay ({0} magic symbol) to cast a copy of Black Lotus without paying its mana cost.
Displacer Kitten triggers, blinking
Garth One-Eye.
If you have no ({R} magic symbol) available, activate the Black Lotus token by tapping and sacrificing it, adding ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Repeat.
Notes
Once you have infinite Black Lotus tokens, you may sacrifice them for infinite mana, and then cast any other card except Shivan Dragon using
Garth One-Eye's ability or activate
Kenrith's abilities.
Once you have infinite mana, you may spend it on
Kenrith's other abilities.
Results
Infinite colored mana.
Infinite lifegain triggers.
Infinite lifegain.
Infinite storm count.
Infinite magecraft triggers.
Infinite +1/+1 counters.
Infinite card draw for any number of players.
Infinite draw triggers for any number of players.
Put all creature cards from all graveyards onto the battlefield under your control.
Infinite Black Lotus tokens.
Infinite casts of all spells permitted by
Garth One-Eye except Shivan Dragon.
Infinite draw triggers for any number of opponents.