Suddenly your 2-mana removal spell costs 3, or your wrath costs 5, and its almost impossible to deal with what your opponent is up to
Argothian Enchantress I prefer [c]Argothian Enchantress[/c] over Eidolon of Blossoms because of its lower mana cost and its shroud ability, making it much harder for your opponents to remove
The Swarmweaver and Wickerfolk Thresher are just a couple examples of the great upgrades Reaper King decks have recently received
Crystalline Sliver Crystalline Sliver allows Sliver players to play their game without being paranoid (or at least, while being less paranoid) that disaster will strike them at any time
And when you do, this 0/2 will become a 3/5 that taps for three mana instead of one, so it's a one-time investment
Temur Sabertooth and Crystal Shard are efficient ways to return creatures we control, while Release to the Wind lets us recast something from exile, which synergizes with the other mechanics mentioned above