Chaos Control can have a difficult time dealing with hyper-defensive play, consisting of set monster after set monster for many turns in a row, because Chaos Sorcerer and Metamorphosis are more optimized to deal with faceup threats
Greater Good is incredibly interesting for Golgari decks because they're known for benefitting from free sacrifice sources like this one
The added oomph from these cards makes punisher-style spells like Risk Factor and Browbeat far more likely to net you card advantage, as they'll demand a much steeper price from your opponents
3 | Kefka, Court Mage Kefka, Court Mage Mana Value: 2UBR Rarity: Mythic Rare Type: Legendary Creature Human Wizard Stats: 4/5 Card Text: Whenever Kefka enters or attacks, each player discards a card
Ive seen it work wonders in Cosima, God of the Voyage decks in particular, though any decks with lands in the graveyard will make great use of them