Consuming Aberration continues to help make itself even larger
Sometimes casting an Underworld Breach will amount to nothing, but more often than not, it will give you access to more cards than a piece of card draw ever could
The adventure adds something, though not enough to justify spending more mana for the primary effect, which is clunky even at four mana
Lets set aside the argument of what would be better in Legacy (spoiler: Mind Twist), despite the fact that Dark Ritual, Ancient Tomb, and City of Traitors are all legal
Viridian Emissary 4 This is OK but not good, you are not looking to sac dorks early or to ramp all that much and so this feels like it is a little too off theme
What if the card had a name with General which was crossed off and replaced with Commander