Mana Screwed - A Saga that can cause a stir

One of the new card types from Dominaria will be Saga's.  They come into play and create an effect, then after each of your next two draw steps it does an additional effect before being sacrificed.  Some aren't all the great, some are more Lore than anything else. However this one has caught my eye.

Being a big fan of artifact decks this will be going into the next one I build.  Usually most of the creatures I run in those decks are already artifact creatures.  But decks like that aren't super common and tend to have a slow build along with a weakened sorcery/instant game.  However this changes that up a bit.  A creature wipe for only four mana that, if you build a deck right, won't affect you at all.  On top of that it cleans out your opponents graveyards on it's farewell... but not yours.  Not to mention that graveyard cleanse is only one turn after the wipe so it limits how many cards a player can save. For the price you pay it is well worth it.

Of course other artifact creature heavy decks won't be affected except by the graveyard flush.  But honestly you don't really see people playing many of those.  So honestly for me I see this as more useful than Urza's Ruinous Blast.  Now if only it wiped Planeswalkers as well....