Activate Gwenna by tapping it, adding {G}{G} that can only be spent to cast creature spells or to activate abilities of creatures.
Cast Ghalta by paying {G}{G}.
Brinelin and Gwenna trigger.
Resolve the Brinelin trigger, returning Thrasta from the battlefield to your hand.
Resolve the Gwenna trigger, putting a +1/+1 counter on it and untapping it.
Activate Gwenna by tapping it, adding {G}{G} that can only be spent to cast creature spells or to activate abilities of creatures.
Cast Thrasta by paying {G}{G}.
Brinelin and Gwenna trigger.
Resolve the Brinelin trigger, returning Ghalta from the battlefield to your hand.
Resolve the Gwenna trigger, putting a +1/+1 counter on it and untapping it.
Repeat.

Infinite +1/+1 counters on Gwenna

Infinite ETB

Infinite LTB

Infinite storm count

Brinelin, the Moon Kraken

Gwenna, Eyes of Gaea

Ghalta, Primal Hunger

Thrasta, Tempest's Roar

Cast Thrasta by paying {10}{G}{G} and commander tax, if applicable.
Activate Food Chain by exiling Thrasta, adding thirteen {G} that can only be spent to cast creature spells.
Choose to have Thrasta returned to the command zone from exile.
Cast Thrasta from the command zone by paying {1} less than the previous casting cost due to Thrasta's first ability and additional commander tax.
Repeat from step 2.

Infinite colored mana that can only be spent to cast creature spells

Infinite commander casts

Food Chain

Activate Phyrexian Altar by sacrificing Thrasta to add {G}.
Choose to put Thrasta in the command zone.
Cast Thrasta for {G}{G}.
Tangleroot triggers, adding {G}.
Repeat.

Infinite death triggers

Infinite sacrifice triggers

Phyrexian Altar

Tangleroot

Activate Kiora's first ability by putting a loyalty counter on it, preventing all damage done to and done by an opponent's planeswalker with three or less loyalty counters on it until your next turn.
At the beginning of your combat phase, Odric triggers, giving creatures you control haste, trample and trample over planeswalkers until end of turn.
Declare Port Razer as an attacker, attacking the planeswalker targeted by Kiora in step 1.
Deal combat damage to the planeswalker's controller due to Port Razer's trample over planeswalkers.
Port Razer triggers, untapping all creatures you control and giving you an additional combat phase after this one.
Repeat from step 2.

Infinite combat damage

Infinite combat phases

Infinite mana creatures you control can produce

Infinite untap of creatures you control

Port Razer

Odric, Lunarch Marshal

Kiora, the Crashing Wave

Activate Dovin by removing a loyalty counter from it, preventing all damage done to and done by an opponent's planeswalker with three or less loyalty counters on it until your next turn.
At the beginning of your combat phase, Odric triggers, giving creatures you control haste, trample and trample over planeswalkers until end of turn.
Declare Port Razer as an attacker, attacking the planeswalker targeted by Dovin in step 1.
Deal combat damage to the planeswalker's controller due to Port Razer's trample over planeswalkers.
Port Razer triggers, untapping all creatures you control and giving you an additional combat phase after this one.
Repeat from step 2.

Dovin, Hand of Control

Combos with "Thrasta, Tempest's Roar"