Having this as deathrattle will make the 1/1 not survive in 99% of times. So be it Malygos, Auctioneer or whatever, won't matter. On the other hand its pretty decent if 1/1 is has a decent deathrattle effect like Aya or Cairne.
I might try this out in N'Zoth Rogue to see how it does. It's still a 4/4 worth of stats for 4 mana, which is only 1 stat off curve, with an upside that can potentially stockpile more deathrattles for N'Zoth.
Nope, Quest rogue needs you to play a minion, not summon it.
But this card... i see so much potential in it. The body is a tad too weak, but hey, playing a copy of a minion from the hand can be very good; and i don't even talk about something like Malygos or something else that might be good, but of something more realistic:
Playing this and summoning a Gadgetzan Auctioneer for 4 mana (and gaining a third gadgetzan auctioneer) can be so very strong that i call this card meta-defining; even if it might not make the cut.
But this card is one of that we might complain about how overpowered this card is in the forums; it alredy gives me a headache...
Seriously? It's not hard to run a rogue deck full of spells and few minions. Very easy to set up a 4 mana malygos and guarantee lethal, you could even get lethal as early as turn 6 or 5 with coin if you draw perfectly, if you can otk that early in the game there's something wrong, why the fuck would you print such an overpowered card for rogue, you could have given this to other classes that aren't already tier 1.