You get an ADDITIONAL legendary hero if you are lucky enough to summon a legendary hero.

I thought it was anyway a legendary if holy shard used. It was an epic 😢

thank you for the answer 

Yeah, I fall for the extra offering too. Mind you, as difficult as that sounds or is, keep your shards for when a guaranteed Legendary is offered or a double chances one. This is probably more aimed for those that have 10's of sacred shard crystals.

I've gotten the extra leggo twice.  Once with sacred shards I pulled a Yannica then got a dup Nobel for free (disappointing but Yannica has uses).  Once with ancient shards I pulled Trunda and got Saito for free, very satisfying.

I'm planning on waiting till Thursday when the fusion begins to see what tourny/event I might be able to piggy back on and then I will probably open my shards.

Oh, I gotten it once as well, but it's not like it happens every day. The more you have the more chances. I'm not too worried about the events any longer, I'm more circumstantially playing - or not at all if I don't want to(e.g. haven't for about a year now till a few days back).  But I've been playing since Beta and it was unpleasant to very unpleasant at times. So this time I returned just to collect the champs and be very cautious about letting it all get to me or otherwise affecting my world.

Nobel is extremely useful, I use mine to empower Ninja. 

I'm using mine in guardian cirle right now.  That way I can always use him later if I decide.