Journey to the Lost City reminds me a bit of getting milled when you dont want your cards ending up in your graveyard
While the 3/3 body for 3 mana isnt exciting, Lord Skitters ability to create a rat token every turn can quickly get out of control, especially against decks that are light on interaction, like ramp
Volrath, the Shapestealer does exactly what his name suggests: he steals shapes
It is likely that we will see a counter spell soon (we play 6 of them in the sample list above), and by the time creatures become a major issue, two white sources will probably have been drawn to fire off our Wrath of God
Unlike the other two bad gifts, you want to own this for as little time as possible - it is all downside after the ETB
With your Commander chosen and 37-38 slots dedicated to lands, you're left with about 62 slots for spells