It certainly is a strong combo but I wouldn't qualify it as absurd. Realize that the effect is not permanent and only applies while Goblin Hood is on the board so there are really 2 different ways of doing it:
1. You play Myra first and then get to draw a few cards from your opponent's deck until Goblin Hood is killed.
2. You wait until you have no cards in your deck and then play Goblin Hood first followed by Myra. That way your opponent loses their entire deck but you're also out of cards. Then I guess you could play Elysiana next turn and you'd probably win but to be honest if you manage to survive for that long as rogue I think it's well deserved.
If you could do both strategies at once it would indeed be absurdly overpowered but since both of these cards are legendary you'll be forced to pick one of them.Taking that into account I think the card is fairly balanced since it really doesn't do anything unless you're out of cards.