Rider's text - "While Riders [...] is in your deck, it meets the criteria to be found by any search effect."
Legacy's text - "Dominence: Pay 3 gold to search your deck for a location card with printed cost 2 or lower, and put that card into play. Then shuffle your deck."
So "search your deck for a location card with printed cost 2 or lower" is the search effect that the Riders satisfy, despite the cost restriction. Since the rest of the Legacy's text only refers to "that card", I see know reason why I couldn't put the Riders directly into play using this event card. And doubley so if I had Rickon in play to copy the effect.
Any disputes on this?
