Cerberus: Clearly aimed at URx style decks, as big spells are even bigger when you copy them
It is in Grixis (black, blue, and black) colors, which is one of the best colors you can have for Treasure decks
Importantly, this means that you do not then have access to the non-Omen side of the card immediately after casting the Omen, as you would with Adventure, but it does mean that when you eventually re-draw the card you will again have the choice of which side to cast
Between your DON
On the other hand, the backsidea new Epharais one of the strongest Enchantresses we've ever seen, as a 4/4 lifelink indestructible creature (assuming you have three enchantments, which you should in a deck that would want Invasion of Theros) that draws a card each time you play an enchantment
Cemetery Desecrator and Noxious Gearhulk Two very similar cards, both Cemetery Desecrator and Noxious Gearhulk are black creatures that give you an incredible amount of value on ETB