({2} magic symbol) ({G} magic symbol) ({U} magic symbol) plus enough mana to pay for commander tax, if applicable available.
Steps
Cast Jyoti from the command zone by paying ({2} magic symbol) ({G} magic symbol) ({U} magic symbol) plus commander tax, if applicable.
When Jyoti enters the battlefield, its first ability triggers, creating a 1/1 Forest Dryad creature token for each time you've cast Jyoti from the command zone this game.
When the Forest Dryads enter the battlefield, Nissa triggers that many times, adding ({1} magic symbol) for each Forest Dryad.
Activate Food Chain by exiling Jyoti, adding ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) that can only be spent to cast creature spells.
Choose to return Jyoti from exile to the command zone.
Activate Food Chain by exiling a Forest Dryad token, adding ({U} magic symbol) that can only be spent to cast creature spells.
Repeat step 6 for each remaining Forest Dryad token.
Repeat from step 1.
Once you have infinite mana, you may forego exiling the Forest Dryads.