Rain of Stones + Natural Elementalist bug

Rain of stones still hits an outlander beast call (and other natural creatures) despite taking the "Natural Elementalist" edge. The edge fixes spells like pillar from striking the beast and other wild creatures but rain of stones still hits them. 'NATURAL ELEMENTALIST' An invoker with this edge has formed a bond with nature; their area spells will not strike nature's creatures, and their fireballs will not burn wilderness terrain. SEE ALSO: EDGES