This clever loop transforms a simple land drop into an engine for infinite tokens by turning your creature additions into actual lands. With Xenograft set to Saprolings, every creature you control naturally counts as a Saproling, which Life and Limb turns into a Forest land in addition to its other types. When you play a land, Retreat to Emeria triggers to create a Kor Ally token, which immediately enters the battlefield as both a Saproling and a Forest. Because that new token is legally a land entering the battlefield, it triggers Retreat to Emeria all over again to sustain an endless cycle of creature and landfall generation.