Myr offer a generally low casting cost for these decks coupled with the two most common myr modes: mana production, and combo synergy
Youll note that many of the problem cards you want Abrupt Decay for are actually enchantments (remember that this includes Courser of Kruphix and bestow creatures)
(It's an artifact with " , , Sacrifice this token: You gain 3 life.") Forestcycling ( , Discard this card: Search your library for a Forest card, reveal it, put it into your hand, then shuffle.) Creature - Treefolk Color tag templates(None) Harrow As an additional cost to cast this spell, sacrifice a land
Include this aura with already beastly Eldrazi like Kozilek, Butcher of Truth, or just conscript one of your many other creatures
Regarded as one of the best one-drops ever printed, Ragavan is an excellent source of mana and card advantage