You see, typal themes are a thorn in the side of R&D
As long as neither player is manipulating their library or using their graveyard, using a Millstone does nothing but reveal information until the player being milled runs out of cards, but it took more explanation than you can possibly imagine to make players understand this
Any creature you control that couldn't be targeted by the original spell (due to shroud, protection abilities, targeting restrictions, or any other reason) is just ignored by Zada's ability
Partner (You can have two commanders if both have partner.) Whenever another permanent you control enters, if it wasn't put onto the battlefield with this ability, you may put a permanent card with equal or lesser mana value from your hand onto the battlefield
Each packet shows you the color(s) and the theme
If youre using Vadrok to cast it, this functions the same as a Wheel of Fortune would