If you could take a faction and add 1 card from another faction which one would it be?
This is focused on what you think would be cool, not what you think would be most powerfull(we all want makantor warbeast, i know)
Lyonar: Doom. Healyonar is lacking a lategame-wincon and doom would be just that. Unlike Abyssian zir"an would have many tools to stall long enough for doom.
Songhai: Holy immolation. It would be realy fun to play, just not to play against.
Vanar: Saurian finality. Vanar already has so much ramp. Imagine how “cool” it would be if they would get saurian finality ontop of all the other ramp to make sure that the opponent never gets to play anything big.
Abyssian: Juxtaposition. Abyssian struggles alot with reach, now they got reach and removal both in one to bring their minions into position.
Vetruvian: Plasmastorm. Now they can inflict justtice upon themselves.
Magmar: Deserves nothing, they already have so much stuff that most factions would strongly consider as staples instantly but magmar does not because there is just too much good stuff(krater, greater fortitude, haruspex, spikes, young silithar , terradon, …)
Though if someone would point a gun to my head i would answer MDS.