Maiden can summon alternative if it was properly summoned before, this means that you first have to add it to your hand with Ancients, summon it by revealing a blue eyes from your hand and then can be summoned directly from the GY
after that step maiden can summon alternative from gy, i tried summon it with maiden and it works. but i forgot did i use that step, or when alternative already in gy the turn before i use maiden. but the point is maiden can summon alternative from gy, just not on the turn he is enter the gy.
edit: just try it, so alternative need to go back to the hand by ancient stone effect, and summoned properly first. after that you can summon it using maiden if he is in the gy.
Alternative is BEWD in the grave, but the one we get isn't properly summoned so we need to properly summon it using ancient to get it from the grave + BEWD in the hand, then when it dies... we could summon it using Maiden. Honestly not really worth.