You control at least one Plains that enters the battlefield untapped.
Steps
Activate Urza's Bauble by tapping and sacrificing it, causing you to look at a card in a player's hand and draw a card at the beginning of the next upkeep.
Activate Tameshi by paying ({W} magic symbol) and returning any Plains that enters the battlefield untapped to your hand from the battlefield, returning Urza's Bauble from your graveyard to the battlefield.
When Urza's Bauble enters the battlefield, Kodama of the East Tree triggers, putting a Plains from your hand onto the battlefield.
Activate the Plains by tapping it, adding ({W} magic symbol) .
Repeat.
Results
Infinite card draw at the beginning of the next upkeep step.
Infinite draw triggers at the beginning of the next upkeep step.