Okay, if it's "A support on your side" then that means any support on your field of play. Offhand I know of two characters that highly revolve around obstructing through negative spell supports (Komachi and Reisen), and a number of others that have a negative spell/leader support in their set. There's probably more than just those, as well. This card could eat those neg supports to draw. It could also be used in tandem with Repair to discard your support to draw and then replay it. Utilizing things like this, Nitori can cycle through her own deck very quickly (allowing you to get cards that you need faster). These sorts of decks do that have a weakness to Sakuya's milling though, so be wary of Press's Sakuya deck. lol
Oh, and btw I found out the weird deal with updating Lackey and losing your appearance, preferences, and active plugin. Just follow these three simple steps, before or after swapping out the updated "LackeyCCG.exe" file:
1. Delete everything inside the "secure" folder in Lackey's directory.
2. Copy your "playerprofile.txt" from the root Lackey folder into the "secure" folder.
3. Download the attached "Preferences.txt" file and move it inside your "secure" folder.
Now, all of the previous settings should load up as they were. For some reason the new Lackey updates only read the profile and preferences from the secure folder, rather than the root directory (as it did before).