Broken Fall

A regeneration source you can never run out of, because it never stays on the battlefield to be destroyed. The trick is in the activation cost: returning the enchantment to hand rather than tapping or paying mana means it survives every board wipe, every disenchant, every creature-based attrition war by simply not being present when removal arrives. The price is tempo. Each regeneration costs a full replay (three mana and a fresh land drop's worth of attention) to set the shield up again, so the card trades the recurring efficiency of a tapped ability for absolute resilience. The design reads as clunky on the rate and becomes load-bearing the moment an opponent tries to grind your creature off the table through repeated removal: there is no permanent for them to answer, only a card in your hand waiting to be redeployed. Green's color identity rarely gets clean reusable protection, and this answers it with a permanent that is permanent in name only, sidestepping the usual cost of leaving a defensive enchantment exposed by making the cost the act of redeploying it.