Cleric Class + Crystalline Crawler + Freed from the Real + Overgrown Arch

Cleric Class

Crystalline Crawler

Freed from the Real

Overgrown Arch

How it works

1. Activate Overgrown Arch's first ability by tapping it, causing you to gain 2 life.
2. Cleric Class 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 Freed from the Real's second ability by paying , untapping Overgrown Arch.
5. Repeat.

This ingenious loop turns a simple defender into a perpetual fountain of life, anchored by Overgrown Arch tapping to generate life while Freed from the Real pays for its own untap costs using blue mana. The secret to sustaining this engine lies in Crystalline Crawler, whose counters are constantly replenished because Cleric Class passively boosts our lifegain and triggers a +1/+1 counter placement every single time the Arch adds life. That newly placed counter can then be immediately converted into the blue mana needed by Freed from the Real, letting you repeat the entire sequence indefinitely for infinite life.