Dilu (+1 horse): defensive mount. Other seats are 1 further away when targeting you — identical in effect to Shadow Runner. Only one defensive mount at a time.
Dilu is identical in effect to Shadow Runner: everyone needs 1 more distance to target you, which puts you out of an unarmed attacker's reach entirely. You may wear only one defensive mount — a new one replaces the old — but a defensive and an offensive mount coexist.