Prerequisites
- Spike Feeder on the battlefield
 - Light of Promise on the battlefield
 
Steps
- Remove a +1/+1 counter to gain 2 life
 - Light of Promise triggers and puts 2 +1/+1 counters on Spike Feeder
 - Repeat
 
Results
Required Cards 2

Spike Feeder
Creature — Spike

Light of Promise
Enchantment — Aura