Update--- July 13th 2015
Banlist changes:
Banned: Grindstone
Unbanned: Painter's Servant
Banned: Grindstone
Unbanned: Painter's Servant
Notes- The inclusion of both of these combo pieces is likely too powerful, Painter's Servant is an interesting card to build with and with a less-powerful version of Grindstone being printed in Sphinx's Tutelage, we found this would be a fun way to shake up the format.
Testing is underway on Gaea's Cradle, Day's Undoing (and Timetwister)- and with finished testing on True-Name Nemesis, preliminary results show there is no need for a ban, as the card's power level is well within the acceptable range (<65% game win rate when cast). Data on True-Name Nemesis' testing will be available when formatting is complete, but I'm going to be pushing more testing rather than data reformatting.
Testing is underway on Gaea's Cradle, Day's Undoing (and Timetwister)- and with finished testing on True-Name Nemesis, preliminary results show there is no need for a ban, as the card's power level is well within the acceptable range (<65% game win rate when cast). Data on True-Name Nemesis' testing will be available when formatting is complete, but I'm going to be pushing more testing rather than data reformatting.