So Galakround cards were unable to be randomly generate through ANY effect..

As of now you can I played highlander priest and generated Scion of Ruin off Dragonqueen Alexstrasza as well as other galakround cards (got also other cards from the priest galakround cards).

If it's intended it mainly buffs priest's Galakround.

I think it's not intended though..

Also you can play wild cards in standard via Whizbang the Wonderful a friend of mine played whizbang and played Northshire Cleric.. I mean if you play whizbang so be it I guess.