The following cards will be changed on Aug 1:

Wild Research -R

The combination of the discard cost, plus the fact that there just aren't enough good targets for this card.

Panoptic Mirror -B, +R

This card is slightly better than Tezzeret the Seeker, which roams free. It costs a lot to cast and is easy to destroy.

Windfall -R

This card is just not good.

Cruel Tutor -R

Much worse than Vampiric Tutor.

Weathered Wayfarer -R

Extremely fragile, almost useless late game.