I think everyone knows what I'm talking about: those cards that just sit in your hand until you get an excuse to discard them. The ones that never seem to have a use, or, if they do, it's so situational as to make them useless.
Given the lively discussion about Sub-Zero Atmosphere recently on some board or other, I'm hoping this thread will spur similar discussion and change people's minds about the usefulness of cards. After all, for me, Scrap Metal recently went from "Bot-Hack fodder" to "card I can't wait to play" because I figured out what it was for.
I'll start things off with my list of "cards I need to be convinced have use":
Coolant Blast: I've never figured out a way to make it work reliably. It's so situational, Thermal Shockwave just seems the all-around superior choice.
Gatling Gun: Sometimes it's nice to have some extra damage, but given the card-per-round cost, I really wish this was 3 damage instead of 2. Turret Bot does this better! I only ever use this as Omni-Cannon ammo.
Enduring Intercession: I have literally never been able to figure out a reason to use this card. I don't think I've ever even tried. What's the point of it?
Astral Premonition: It's a worse version of Dark Visionary's power. Which, while a good power, is generally not something I want to give up precious, precious Amulet fodder for. (Then again, it's worth mentioning that I don't like playing Nightmist because I've never figured out more than one strategy for her.)
Self-Sabotage: Is there ever a time this is better than Singularity as a finishing move?
Vicious Cyclone: Great for Sacrifice Tempest to sacrifice, but runs far too afoul of DR for my tastes.
Mass Levitation: It's got its uses, but I always feel like Visionary is better off doing anything else, even just using Foresight.
Smoke Bombs: This one isn't quite as "I never use it" as "I've had a bad time with it before". In theory, it's a good idea, but I remember one game that was thoroughly ruined because Smoke Bombs was just making my team die faster. I can't recall why, unfortunately.