Arcanis the Omnipotent | Tolarian Kraken | Fyndhorn Elder

Cards

All permanents on the battlefield (
Arcanis the Omnipotent and
Fyndhorn Elder without summoning sickness).

Activate
Fyndhorn Elder by tapping it, adding ({G} magic symbol) ({G} magic symbol) .
Activate
Arcanis's first ability by tapping it, causing you to draw three cards.
Tolarian Kraken triggers three times. Resolve the first two triggers, causing you to pay ({2} magic symbol) to untap
Arcanis and
Fyndhorn Elder.
Resolve the last
Tolarian Kraken trigger, choosing not to pay.
Repeat.

If mana allows, you can untap a creature using
Tolarian Kraken's third trigger - although it is not necessary to execute the combo.