Inexorable Tide + Crystalline Crawler + Gemstone Array + Kor Skyfisher

Inexorable Tide

Crystalline Crawler

Gemstone Array

Kor Skyfisher

How it works

1. Cast Kor Skyfisher by paying 1.
2. Inexorable Tide triggers, putting a +1/+1 counter on Crystalline Crawler and a charge counter on Gemstone Array.
3. When Kor Skyfisher enters the battlefield, it triggers, returning itself from the battlefield to your hand.
4. Activate Gemstone Array's second ability by removing a charge counter from it, adding .
5. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding 1.
6. Repeat.