Name:Grindstone
ManaCost:1
Types:Artifact
A:AB$ Repeat | Cost$ 3 T | ValidTgts$ Player | RepeatSubAbility$ DBCleanAndGrind | MaxRepeat$ MaxRepeats | RepeatCheckSVar$ MilledSharesColor | RepeatSVarCompare$ GE2 | SubAbility$ DBCleanup | SpellDescription$ Target player mills two cards. If two cards that share a color were milled this way, repeat this process. | StackDescription$ SpellDescription
SVar:DBCleanAndGrind:DB$ Cleanup | ClearRemembered$ True | SubAbility$ DBGrind
SVar:DBGrind:DB$ Mill | NumCards$ 2 | Defined$ Targeted | NoReveal$ True | RememberMilled$ True
SVar:MaxRepeats:TargetedPlayer$CardsInLibrary
SVar:MilledSharesColor:Remembered$Valid Card.SharesColorWithOther Remembered
SVar:DBCleanup:DB$ Cleanup | ClearRemembered$ True
Oracle:{3}, {T}: Target player mills two cards. If two cards that share a color were milled this way, repeat this process.