Onderzeeboot
Ecstatic Orb
One card that I really loved during prerelease was Archers' Parapet. 0/5 was pretty innocuous, but it stonewalls a ton of stuff early in the game and pinging for 1 at opponent's EOT was so useful. I'm pretty sure I did 12 points of damage to a guy through a grindfest and lost to another one because I just couldn't deal with it. I really wanted to play with Kin-Tree Invocation and make 5/5's for but I didn't have a single one in pool. Hopefully I can live the dream a few times in draft.
You should try to go Disowned Ancestor into Kin-Tree Invocation into a relevant three-drop