Brinelin, the Moon Kraken, Gwenna, Eyes of Gaea, Ghalta, Primal Hunger, and Sailors' Bane

Prerequisites

• Brinelin, the Moon Kraken on the battlefield
• Gwenna, Eyes of Gaea on the battlefield
• Ghalta, Primal Hunger in hand
• Sailors' Bane on the battlefield

Steps

1. Activate Gwenna by tapping it, adding that can only be spent to cast creature spells or to activate abilities of creatures
2. Cast Ghalta by paying
3. Brinelin and Gwenna trigger
4. Resolve the Brinelin trigger, returning Sailors' Bane from the battlefield to your hand
5. Resolve the Gwenna trigger, putting a +1/+1 counter on it and untapping it
6. Activate Gwenna by tapping it, adding that can only be spent to cast creature spells or to activate abilities of creatures
7. Cast Sailors' Bane by paying
8. Brinelin and Gwenna trigger
9. Resolve the Brinelin trigger, returning Ghalta from the battlefield to your hand
10. Resolve the Gwenna trigger, putting a +1/+1 counter on it and untapping it
11. Repeat

Results

• Infinite +1/+1 counters on Gwenna
• Infinite ETB
• Infinite LTB
• Infinite storm count