Activate Oketra the True by paying {W} due to Agatha of the Vile Cauldron, creating a 1/1 Warrior creature token.
Activate Phyrexian Altar by sacrificing the Warrior, adding {W}.
Repeat.

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Agatha of the Vile Cauldron

Phyrexian Altar

Oketra the True

Activate Oketra by paying {3}{W}, creating a 1/1 Frog, a 1/1 Warrior and two 1/1 Squirrel creature tokens.
Activate Earthcraft by tapping a Warrior, Squirrel or Frog, untapping a basic Plains.
Activate the Plains by tapping it, adding {W}.
Repeat from step 2 three additional times.
Repeat from step 1.

Infinite tapped creature tokens

Earthcraft

Chatterfang, Squirrel General

Quina, Qu Gourmet

Activate Oketra by paying {3}{W}, creating two 1/1 Squirrel, one 1/1 Frog and one 1/1 Warrior creature token.
Activate Phyrexian Altar four times by sacrificing the Frog, Squirrels and Warrior, adding {3}{W}.
Repeat.

Combos with "Oketra the True"