# Circle of Protection: Green (Unlimited) Circle of Protection: Green represents a foundational design from Magic's earliest era. As a common from Unlimited, it exemplifies the straightforward utility cards that defined the format's accessibility. Collectors value Unlimited commons for their historical significance despite their modest power level. The card matters primarily as a set completion piece. Serious Unlimited collectors pursue playsets of commons to document the format's complete card pool. Condition becomes the meaningful variable here—finding well-preserved copies of frequently played commons proves surprisingly challenging after decades. This card holds no special variants or chase elements. Its appeal rests entirely on set completion and condition-hunting rather than scarcity or uniqueness, making it a practical rather than speculative collect.