Solitary Sanctuary + Crystalline Crawler + Ballynock Trapper + Pemmin's Aura

Solitary Sanctuary

Crystalline Crawler

Ballynock Trapper

Pemmin's Aura

How it works

1. Activate Ballynock Trapper by tapping it, tapping a creature an opponent controls.
2. Solitary Sactuary triggers, putting a +1/+1 counter on Crystalline Crawler.
3. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding .
4. Activate Pemmin's Aura's first ability by paying , untapping Ballynock Trapper.
5. Repeat.
6. You may also repeat this loop during each turn.

This elegant loop turns the simple act of locking down opposing boards into a self-sustaining engine. By using Ballynock Trapper to tap down an opponent's creature, you trigger Solitary Sanctuary to feed a +1/+1 counter directly onto Crystalline Crawler. You then strip that very counter away using Crystalline Crawler's mana ability to generate the blue mana needed for Pemmin's Aura to untap Ballynock Trapper, resetting the entire process.